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!
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):
DealExtreme SKU 20392 TrustFire Protected 18650 3 7V True 2400mAh Rechargeable Lithium Batteries 2 Pack
|BLUE 4 x UltraFire 18650 3000mAh 3.7V Rechargeable Battery +1x dual Charger
Product Description Color: blue 4pcs UltraFire 18650 3000mAh 3.7V Rechargeable Battery + 1x dual Charger Warming Tips: 1.Don't not insert batteries with (+)and (-) reversed 2.Do not disassemble ,dispose in fire ,heat or shot circuit 3.Don not submerge the Battery in water ....
|Outlite 2 PCS 3.7V 18650 3600mAh Protected Lithium Li-ion Rechargeable Battery for LED Light& Headlight& Headlamp& Handheld Flashlight& Torch with 1PCS Quick Smart Charger
Indicator light lets you know when charging is complete.
Designed to charge your batteries quickly and safely.
|2 x UltraFire 18650 3000mAh 3.7V Rechargeable Battery + Charger
2PCS UltraFire Bright CREE 1600LM Lumen Adjustable LED Aluminum alloy Flashlight Torch + Charger + 2 x 18650 Battery, 5 Mode...
|4 PCS UltraFire 3.7V 18650 Battery Rechargeable Li-ion 18650 5000mah + 1PCS Two-slot Travel Charger
Product Description Battery Features: 1 High quality and durable 2 Provides excellent continuous power sources to your device 3 High energy density, long life span Specifications: 1. Battery Type:18650 battery 2. Capacity:5000mAh 3. Voltage: 3.7v 4. Charge Time: about 6~8hours 5 Rechargeable Times: about 500~700 6 Material: Li-ion Battery 7 Dimensions: 6.5 x 1.7 cm 8 Weight: 180g Battery Charger F...
|12 Pack of 3.7V 5000mAH 18650 Rechargeable Li-ion Battery Yellow
Notes: Do not dispose in fire or heat. Do not puncture,damage,and disassemble. Do not mix fresh batteries with used batteries. Battery Description: * Low discharge rate. * Safe and environmental friendly. * High energy density, long life battery. * No memory effect, recharge up to 1000 cycles. * Durable in low and high temperature operations. * Suitable for laser pointer, flashlight tor...
|4pcs Ultrafire 18650 3000 mAh 3.7V Li-ion Rechargeable Battery+1pcs Charger
2.High quality and durable
3.Provides excellent continuous power sources to your device
4.High energy density, long life battery
5.This battery has an extra long life for all your battery powered devices
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