18650 7v Battery

18650 7v Battery
Are ALL 18650 batteries rechargeable?

I’ve recently got myself a very nice 50mw green laser – however it’s been starting to dim and flicker quite a bit. I measured the battery (18650) it came with, which is meant to be 3.7V, and it is in fact 2.9V! So basically, I’m hoping it’s the battery that is causing the beam to dim – but I need to know if the battery I have is rechargeable.
It’s in a plain blue plastic casing, and says “Tian Lin 18650 2800mAh 3.7V” – any experience with these batteries – or 2 CR123 batteries together would be very much appreciated!

Thanks.

No, not all of them are. I have some that are and some that aren’t. Neither of them say so on the label (I tell them apart by color), so it’s possible yours are rechargeable but I doubt that they would come with the laser.

If you want to buy some rechargeable ones and a charger, these are the ones I have (from that site, too):
http://www.dealextreme.com/details.dx/sku.19770
http://www.dealextreme.com/details.dx/sku.6105

DealExtreme SKU 20392 TrustFire Protected 18650 3 7V True 2400mAh Rechargeable Lithium Batteries 2 Pack

Intsun® 2pcs 3.7V 18650 4000mah Rechargeable Li-ion Battery with PCB and 18650 battery Charger for LED Flashlight, Headlamps, search light lamp, etc
Intsun® 2pcs 3.7V 18650 4000mah Rechargeable Li-ion Battery with PCB and 18650 battery Charger for LED Flashlight, Headlamps, search light lamp, etc
$12.98
Features: * High quality and durable. * No memory effect, Environmentally friendly. * Provides excellent continuous power sources to your device. * This battery has an extra long life for all your battery powered devices. * With overcharge / discharge protection function that you can use it without worry. * Can be used in laser pointer, Led Flashlights, Headlamps and other electronic produc…
Rextin 18650 BRC Protected Rechargeable Lithium Battery (Pair) 3.7V 4200mAh+ Double 18650 Lithium Battery Charger
Rextin 18650 BRC Protected Rechargeable Lithium Battery (Pair) 3.7V 4200mAh+ Double 18650 Lithium Battery Charger
$9.99
Reliable & Professional of Rextin® We registered trademark Rextin® in United states ,professional on batteries and chargers,Rextin always persistently providing high quality and services for everyone: 30 Days money back with one year seller warranty Specifications: 1. Battery Type:18650 recharegeable battery 2. Voltage: 3.7v 3. Capacity: 4200mAh 4. Charge Time: about 6~8hours 5. Rechargea…
Intsun 4pcs 3.7V 18650 4000mah Rechargeable Li-ion Battery with PCB and 18650 battery Charger for LED Flashlight, Headlamps, search light lamp, etc ...
Intsun 4pcs 3.7V 18650 4000mah Rechargeable Li-ion Battery with PCB and 18650 battery Charger for LED Flashlight, Headlamps, search light lamp, etc …

SmartLive 4 pcs 3.7V 18650 5000mah Rechargeable Lithium Battery with 18650 battery Charger
SmartLive 4 pcs 3.7V 18650 5000mah Rechargeable Lithium Battery with 18650 battery Charger
$10.99
Battery type:18650 Voltage:3.7V Capacity:5000mAh Material: Li-ion Dimensions: 6.5 cmLength x 2 cm Diameter Charger Input Voltage: 100V~240V 50/60Hz 150mAh Output: DC 4.2V 600mA Suitable for 18650 Li-ion for 2pcs batteries…
Refun 4pcs 18650 4000mAh 3.7V Protected Rechargeable Lithium Battery with Fast Li-ion Battery Charger for Handheld Flashlight Headlight Headlamp and Torch
Refun 4pcs 18650 4000mAh 3.7V Protected Rechargeable Lithium Battery with Fast Li-ion Battery Charger for Handheld Flashlight Headlight Headlamp and Torch
$14.99
Indicator light lets you know when charging is complete. Designed to charge your batteries quickly and safely. 1) Input Voltage: 110-240V, 47-63Hz 2) Output: 4.2V 4000mA 3) Charges 1 or 2 batteries simultaneously 4) Dimensions: 3.34 in x 1.85 in x 1.49 in 5) Weight: 2.46 oz. 6) Li-Ion Rechargeable 18650 with IC Protection. 7) Capacity: 4000mAh. 8) Over-Charging / Draining at 4.2v / 2,75v 9) Vol…
SOAIY Fast Universal USB Battery Charger for 3.7V 18650 Li ion Battery and 1.2V Ni-Mh Ni-Cd Rechargeable Batteries, A AA AAA 18500 18350 Batteries ect., 2 Slots
SOAIY Fast Universal USB Battery Charger for 3.7V 18650 Li ion Battery and 1.2V Ni-Mh Ni-Cd Rechargeable Batteries, A AA AAA 18500 18350 Batteries ect., 2 Slots
$11.99
Attentions: 1. Banned for non-rechargeable batteries. 2. Do not charge reverse battery. 3. This machine is equipped with a 2A USB cable; try to use a standard USB cable in order to achieve the best charging effect. Details as follows: Input:DC 5V–1000mA Output:DC 4.2V–1000mA*1,500mA*2(Li-ion) DC 1.4V–1000mA*1, 500mA*2(Ni-Mh/Ni-Cd) Note: when the input current is DC 5V-1000mA,…
4x Perman 18650 5800mAh 3.7v Li-ion Rechargeable Battery for LED Flashlight Lamp Torch Lighting
4x Perman 18650 5800mAh 3.7v Li-ion Rechargeable Battery for LED Flashlight Lamp Torch Lighting
$7.77
4x 18650 3.7v Rechargeable Battery…
4Pcs Perman 3.7v 5800mAh 18650 Battery Li-ion Rechargeable Battery + 2Pcs Dual Smart Charger US
4Pcs Perman 3.7v 5800mAh 18650 Battery Li-ion Rechargeable Battery + 2Pcs Dual Smart Charger US
$12.49
WARNING: DO NOT dispose in fire or heat; DO NOT mix fresh batteries with used batteries DO NOT puncture,damage,and disassemble; Package Includes: 4pcs x 18650 3.7 Rechargeable Battery 2pcs x Dual Smart 18650 Battery Charger…
EBL Fast Lithium Battery Charger with 3.7V 3000mAh 18650 Li-ion Rechargeable Batteries, 4 Pack
EBL Fast Lithium Battery Charger with 3.7V 3000mAh 18650 Li-ion Rechargeable Batteries, 4 Pack
$17.99
Features of EBL 18650 batteries * Low self discharge technology, holds 75% of capacity after one year of no used after fully charged. * 0.1V higher than others’ when fully charged, more suitable for long time usage. * Longer vitality, up to 1000 cycles, high retention rate of electric charge with excellent discharge performance at high temperature. * Good at shedding heat, short circuit and input …
LP 3 Speeds Portable Mini USB Fan, Rechargeable Pocket Fan Including 18650 Rechargeable Battery, With High Energy Efficience And Ideal For Travelling Jogging or Sun Bathing (black)
LP 3 Speeds Portable Mini USB Fan, Rechargeable Pocket Fan Including 18650 Rechargeable Battery, With High Energy Efficience And Ideal For Travelling Jogging or Sun Bathing (black)
$19.50
Description: LP 3 speeds Portable mini USB Fan is designed for both outdoor and indoor use. It can be powered by 18650 rechargeable battery or computers/laptops (18650 rechargeable battery included). The rechargeable fan speed can be adjusted among slow, medium, high, so you will be always comfortable with it. Due to its smart design and high energy efficience, the fan is ideal for travelling, j…

Incoming search terms:

  • 18650 Battery size