8 best battery pack for bike lights

• High-Quality, Very Long-Lasting 8.4v Bike Light Rechargeable Battery Pack
• New 8.4V 6400mAH Rechargeable lithium ion Replacement Spare Battery pack Set for CREE T6 LED 1200lm bike lights
• We Would Love to Say This Battery Lasts A Lifetime, But We Can't. Batteries Just Don't Last Forever
• However, We Give You A 1-YEAR, NO HASSLE Warranty against defects!
• You Will Not Be Disappointed

User questions & answers

Question:	Could someone tell me the power output of the charger
Answer:	Power output depends on what light you use. Check the voltage rating of your lights...if they match, this battery will pump out whatever power is required!
Question:	I bought this battery but it flashes green & red when I plug it into the charger (and doesn't charge). Is it my charger or the battery at fault
Answer:	I've also seen the flashing LEDs when dirt and/or corrosion needs to be cleaned off the terminals. I've found this particularly irritating for the battery pack terminals made out of garbage-cheap alloys. Any corrosion and it can screw-up the monitoring processor in the charger.
Question:	I have a different manufacturer led bike light (serfas true t1000). can i use this battery as a backup battery
Answer:	Check the connection type and voltage rating.
Question:	What brand and model of battery is in the 6400mah pack? if it is really 6400mah, you should publish this data
Answer:	I don't know 6400mah pack. All I know is that I was very please with the purchase. I use a 1200lumen Cree light and the battery last me three hours. I have never used it past 3 hours. The only draw back is after a year or more it looses strength and then will not charge. However, it's very cheap and for that price I don't mind buying one every years.

• Super Bright: Please note that only our store DAFUNDER sells headlamps with waterproof batteries, batteries sold in other stores are not waterproof, JasslifeUS this store sells fakes, please buy form DAFUNDER store. The bicycle front light battery upgraded from 9000mAh to 9600mAh, which can last approximately 4 hours on strong light mode, 6 hours on flash light mode and 10 hours on low light mode, perfect for night riding.
• Upgraded Version: The bike headlamp battery upgraded from plastic material to silicon waterproof, which can be used for outdoor activities in rainy days. It will be more convenient and safe.
• Widespread Uses: Used For Headlamp or Bicycle Front Light for camping, climbing, hiking, fishing, spelunking.
• Three Adjustable Modes: There is a single button on the back of the led headlamp, where you can choose the mode strong - weak- flash you need.
• Easy Installation: This bicycle light is easy to install, just hook the rubber o-ring on the lip of the plastic base, then go around to your handlebar to the other lip.

User questions & answers

Question:	Where can I buy the battery for this light
Answer:	Try this: https://www.amazon.com/Ideolco-20000mAh-Rechargeable-Replacement-Mountain/dp/B07K31VBLY/ref=sr_1_9?crid=FQ38HQJQ77HS&dchild=1&keywords=weihao+bicycle+headlight+battery+replacement&qid=1603328910&sprefix=Weihao+Bicycle+Headlight+battery%2Caps%2C317&sr=8-9
Question:	My package didnt come with instructions, I am curious to how to recharge the battery pack. Unsure if the silicone coating needs to come off
Answer:	No don’t take off the silicone cover. Plug the charger in the light is green. When you plug in the battery the light will go red until completely charged.
Question:	How many lumens is this light? Is it really 10500 lumens
Answer:	Assuming they use a Cree XML T6 LED, each one puts out a rated 1040 Lumen, so theoretically it would output around 7000 lumen. 10500 is out of the question, but I have a flashlight with 18 T6 LEDs and it will light up the side of a house at 300 feet, so yes, these outputs are realistic.
Question:	Is this 10500 lumen as it said, or a typo, 1500 lumen? i just want to make sure. thank you
Answer:	It's definitely not 10,500 lumens. Even 1,500 lumens seems a bit high -- 800 would be a better guess. That said, most of these cheap LED lights overstate their lumen ratings. Many just look at the maximum possible rating for each LED and add them up, even though they don't drive them anywhere near that hard. Now, is 10,500 lumens this a typo or an exaggeration or a flat out lie? I do not know. But consider that HID car lights (perhaps some of the most luminous ones out there) only put out about 3000 lumens/bulb. Either way, it does put out a pretty decent amount of light. The light itself is a bit overly large for a bike light -- you can get ones that are a good deal smaller and put out the same light -- but it's not bad at all. But yeah, never trust the lumen figures they give.

Product features

Three Adjustable Modes

There is a single button on the back of the led headlamp, where you can choose the mode strong - weak- flash you need.

Upgraded Version

The bicycle front light battery upgraded from 6000mAh to 6400mAh and the bike headlamp battery upgraded from plastic material to silicon waterproof, which can be used for outdoor activities in rainy days. It will be more convenient and safe.

Widespread Uses

Used For Headlamp or Bicycle Front Light for camping, climbing, hiking, fishing, spelunking.

Package included

1 x Bicycle HeadLight

2 x Rubber Ring

1 x Headband

1 x 8.4v 9600mAh battery pack

1 x AC Charger (100-240V)

Features

1:This is a super bright LED bike front headlight which can come up to 10500lm.

2:100v-240v battery charger (when charging, the charger LED is red, fully charged is green)

3: Aluminum alloy waterproof design that can be used in the rainy days on outdoor activities

4: This handlebar light also can be used as a standalone flashlight or emergency, illumination, rescuing, SOS light

5:Internal wiring with high efficiency boost circuit, wide operating voltage, you can maximize the use of batteries.

• Gemini Battery 2 Cell

User questions & answers

Question:	What type of battery technology; NmH or Lithium
Answer:	I received 2 remotes with my purchase. I was surprised. So I got 6 lights and 2 remotes. I am very pleased.
Question:	This battery pack has a female plug. My light has a female plug. Do you have an adapter or should I return the battery pack
Answer:	No, in order to save battery energy, when using LED lights, one must choose between four timings to turn on the LEDs. The default is 5 minutes timing. If you need to turn off the timer function, please click on this help and we will change the function.
Question:	Does it work for magicshine lights
Answer:	The color of the case is silver.
Question:	How do I make a warranty claim on this thing? Mine started on fire when I was trying to charge it
Answer:	The product is from China

Product description

Note:

When you received the unit.it only have 30-60% capacitance.you need use up the all capacitance.then keep charging for 14-16 hours for the first.then it can be lasting for 4-5 hours

Features:

-Battery pack interface:DC5.5 * 2.5mm female

-Portable and large capacity

-Can be used for bicycle light, headlamp or other devices

Specifications:

-Material:Lithium

-Type:Lithium ion

-Model:18650 battery pack (10*18650)

-Capacity:20000mAh

-Voltage:Fit 8.4V 7.2V and 4.8V

-Rechargeable times:Up to 500 times

-Application:Can be used for bicycle light,headlamp,etc

-Weight:Approx.280g/11.2oz

• Weight :1.21 Pounds(US charger including).
• Capacitance：10pcs 18650 20000mah Rechargeable Li battery
• Lasting Time:4-5 hours .After using up the capacitance.Keep Charging for 14 hours until green light appear.
• Support For:All kinds of Bike Bicycle Light.Headlight.T6 Cree bike light
• Compatible with:Long time cycling.Cycling in night. Bicycle Club

User questions & answers

Question:	Is this battery waterproof
Answer:	Yes the more lumens the brighter. This is a great light!
Question:	What is the weight of just the battery pack? The description says 11.2 ounces and 1.2 lbs
Answer:	Are you talking about while it is on? I wouldn't worry about that. LED's are very efficient. If you're worried about it while it's off but plugged into the battery then just unplug it.
Question:	Can this battery be used for a 20 watt halogen light
Answer:	Compre 2 una vez ,la primera la trajo, la segunda no..... Entonces no puedo decirte con certeza si es así....
Question:	The listing shows: " 8.4v, 7.2v, 4.8v". is this voltage selectable? if so, how is it done
Answer:	With a full charge on the battery I got 1 hour 15 minutes of battery life on the lowest setting. I run the same test on the highest setting only received 20 minutes run time. Hope this helps.

• Bright Eyes 10,400mAh Bike Light Battery - Now Higher Capacity - Works with CREE T6 LED 1200lm or 1800lm Bike Lights - 8.4v

User questions & answers

Question:	I got the helios. How much battery life can i get from this if i run my light on a medium setting
Answer:	Yes,The Soonfire FD38S USB Rechargeable Bike Headlight has a camera mount hole(1/4") threaded hole for an out front mount,thank you!
Question:	Can someone give me the dimensions? I need it to fit in a standard water bottle like the old ones. Thanks
Answer:	For the time being Direct use is not supported camera tri-pod(1/4-20 thread),designed by the light fans based on the feedbacks of the customers for the long time,at the September light will add this feature.Soonfire FD38S USB Rechargeable Bike Headlight Applicable for handlebar size: 22-35MM (adjustable in size and suitable for most bicycles).thanks!

Product description

>>>>> 3-in-1 Bike Headlight USB Rechargeable with 5 Lighting Modes Horn

Features:

3-in-1, stopwatch, horn, lamp

Specification:

Name: Anti-theft Lamp

Sound mode: 5

Color: red/blue/black

Weight: about 176g

Size: about 101.1*49.5*24.5cm/39.8*19.49*9.64in

Sound distribution: 130 decibels

Lamp beads: XPG+COB+2835*2

Material: ABS+GPPS

Main light/fog light: 300 lumens/30 lumens

Charging time: about 2.5 hours

Battery: 1200 mAh polymer lithium battery

Waterproof rating: Level 4

Charge times: 500 times+

Power indicator brightness: 100%-75%-50%-25%

Packing List:

Lamp Body*1

Base*1

Charging Cable*1

Sensor*2

Horn Controller*1

Magnet Transmitter *1

• USB RECHARGEABLE BIKE HEADLIGHT – This LED bicycle headlight has a built-in 1200mAh battery with anti overcharging and discharging function and can be used for 3.5-6.5 hours. There are also four battery indicators on the headlight. The taillight is equipped with two powerful button cell batteries which can be used for a long time and easily changed.
• BIKE SPEEDOMETER AND VERSATILE – This headlight display can show not only speed but also single trip mileage, total mileage, riding time, calories and fat consumed. The bike light can also play a role as an emergency flashing light. This bike light set is versatile enough for night cycling, hiking, camping, or any outdoor activity.
• SUPER BRIGHT AND POWERFUL – This super bright LED bike light set has five light modes. Anti-glare high beam main light can shine up easily and goes far to ensure your safe cycling at night. Matching with 2 highlight amber fog lights, it can powerfully light up the front roads even in foggy or rainy days. 10COB red light beads on both sides which enable high visibility make the passengers and coming vehicles can see each other from a long distance.
• QUICK TO INSTALL AND RELEASE – The LED bike front light is equipped with a mounting bracket that can be easily fixed to the handlebar. The silicone mount strap for Headlight and Taillight are designed with several openings that can tightly fit around most size seat posts. Easy and quick to install and release.
• GREAT SPEAKER AND WATERPROOF – The headlight and horn have a two-in-one switch, which is very convenient to control. The speaker sound is as high as 130dB. The bike lights also have excellent waterproof function, so don＇t worry about using them even in rainy days.

Product description

Brand: SecurityIng - Explore The Unknown





Bicycle Light:

- Color: Black

- Light Color: Cool White

- Shell Material: Aircraft Aluminum with Military Type III Hard-Anodized

- Lens Type: Glass Lens

- Reflector Type: Aluminum Textured

- Switch Placement: Back of the bicycle light

- Switch Type: Clicky

- 4 Switch Modes: Weak / Middle / Strong / Strobe

- Waterproof Rate: IPX-7

- Visible Distance: 200m

- Anti-drop Height: 1.5m

High-performance Electronic Switch:

- Slightly click the switch to turn ON / OFF the light

- Slightly click the switch to change the brightness modes, LOW - MID - HIGH

- Long press the switch for more than one second to access to strobe mode

Battery Indicator (beside the blue button):

- Three lights lit on (power more than 80 %)

- Two lights lit on (power between 50 % and 80 %)

- One light will lit on and will flash three (runtime less than 30minutes)

LED:

- Chip Type: Cree XM-L U2

- Quantity: 2

- Luminous Flux: 1200lm

- Lifespan: 50,000 hours

- Lighting Source: LED

- Light Source Color: 6500K

- Lighting Intensity: 3000cd

Power & Battery Pack:

- SecurityIng 1 x 8.4V 4000mAh Battery Pack (Included)

- Output: DC 8.4V, 2.4A

- Charger Input: 100V-240V, 50/60Hz

- Charging time: 4.5 hours

- Runtime: Up to 2.5 hours (high mode)

- LED Indication for: Power On / Charging / Full charge

- Working Time: 3 ~ 4 hours after full charging

Size: 42mm (Length) x 60mm (Width) x 38mm (Height) /1.65 x 2.36 x 1.50in

Product Weight : 96 G / 3.39 Ounces





Package Include:



1 x LED Bicycle Light

2 x Rubber Ring

1 x 8.4V 4000mAh Battery Pack

1 x Power Adapter

• Super Bright Bike Headlamp - Maximum brightness comes to 1200 lumens. Can throw a beam over 200m into the darkness. Internal wiring applies high efficient booster circuit utilize batteries in the largest extent.
• 4 Modes Available & 2 Cooling Devices - Weak / Middle / Strong / Strobe, Intelligent circuit control, suit for different needs. Two ears of the light is equipped with a cooling device, helping the heat dissipation.
• Long Battery Life & LED Indication - Comes with powerful rechargeable 8.4V 4000mAh battery pack as power source. Works Up to 2.5 hours (high mode) after full charging. Timely battery indicator helps you master battery condition.
• Can be used as Bicycle light - The bike light comes with 2 rubber sealing ring, either handlebar mount or head strap mount is available. Easy to install and use.
• Waterproof Design & Sturdy and durable - Anodized aluminum with glass lens, waterproof and weather resistant. Perfect item for outdoor sports, such as camping, traveling, hiking, cycling, searching.

User questions & answers

Question:	how long does it take to charge and how do i know if it's fully charged? I spent all day charging the battery and within 10m there was only 1 light
Answer:	I initially charged it overnight, and it lasted for several weeks of ~1 hour long rides. However I don't ride with it always on the highest (brightest) setting - it has three brightness levels, and I usually ride with it on the lowest or middle level, only using the brightest level for short times when I really need the extra lighting.
Question:	Might sound crazy but has anyone run this light on 12 volts
Answer:	My battery pack died long ago and I recently dug this light out of the bin to rig up on an ebike. Thinking the voltage was 13.something I plugged it into my 12V test bench to fit some pieces to help beam pattern, lo and behold the light fired up fine, ran it at every setting for 40+ minutes. Gets blisteringly hot, but then again it did that with the 8.4V battery too. I'll simply run it at 8.4V to be safe
Question:	How long does the battery last on high
Answer:	At least 1.5 hours on high, but over 2.5 on low. This light is blinding even on low. I glued some diffuser film to the face of the frame with instant glue to remove the mild hot (bright) spots. It turns night into day. Buy the second battery if you are going long. Warning -This light (LEDs) just shut off without warning when the battery is discharged. Usually at the worst time.
Question:	Is the light beam more on the focused side of the wide side? Part of the street I ride is down-hill so I prefer focused light to see farther, unless the light is so bright that it lighten up both far and close
Answer:	It's a great mix of wide beam and good throw. There are two different lenses and each are tuned a bit different. I have no trouble at all doing a 30mph downhill singletrck with it on high, so I doubt you'll have much trouble at all. I do most trails with it on medium, and only need high for fast downhills.

• Multi-function: Safety light for running, walking or any other sports especially at dawn, dusk, night or rainy days; Perfect for use as a bike rear, back and tail light, emergency light and collar light for your pet.
• User-friendly design: Slim, lightweight, compact, and super bright safety lights. Weighing in at 1.76 oz, measuring 2.55 x 1.18 inches, you won't even know you're wearing them, yet be seen from a safe distance.
• 3 lightning modes: Steady-on, fast strobe and slow strobe, accessible by one click.
• Free bonuses: Includes 2 x Straps (for mounting the lights to dog collars, bikes and more) and a mini-screwdriver for a hassle-free battery replacement process.
• Easy to use: Clip on to your belt, pockets, backpack, helmet, your dog's leach, bike, baby stroller, wheelchair or clothing easily. No tools needed to install it or remove it.

User questions & answers

Question:	Can these lights be seen during daylght
Answer:	Thanks for your inquiry. The light is bight for night time use. And for me, its light is still bright enough during daylight and cannot be ignored. If you have anymore questions, please contact us anytime.
Question:	Are they water proof? Submersible
Answer:	They are "water resistant" to rain and poor weather. But, I do not know if they are 100 % water proof/submersible. I use them for running/cycling/hiking.
Question:	are the batteries replaceable
Answer:	Yes--it takes two standard CR 2032 batteries available at the grocery store. The package also includes a mini screwdriver so you can change the batteries. I'm very happy with the light overall.
Question:	What are the dimensions, since really bad photoshop shows them to be the size of a watermelon
Answer:	Thanks for your inquiry and sorry for the bad product display picture. We will add product dimension display picture later days. The dimension of this item is 55mm*30mm*18mm. If you have any questions, please contact us anytime.

Product features

Hiking

Jogging

Walking the dog

Bike taillight

Helmet

Bike headlight

Outdoor activities