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
|Tangsfire 18650 3600mah 3.7v Rechargeable Li-ion Battery (Pair) + Charger Combo
Indicator light lets you know when charging is complete.
Designed to charge your batteries quickly and safely.
Input Voltage: 110-240V, 47-63Hz
Output: 4.2V 600mA
Charges 1 or 2 batteries simultaneously
Dimensions: 3.34 in x 1.85 in x 1.49 in
Weight: 2.46 oz.
Tangsfire® Li-Ion Rechargeable 18650 with IC Protection.
Can be used in laser pointer,Torch Fla…
|4pcs 18650 4000 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
|4Pcs 3.7V 18650 3000mah Rechargeable Lithium Battery with Charger 18650 Battery Charger: The AC adapter easily folds out to charge and pack away Charge two batteries one time. Compatible with 18650, 16430, 14500, LIR123A, 10440 Li-ion battries LED indication for Power On / Charging / Full charge AC110v-240v 47-63Hz input (international charger, also can be used worldwide) Does not support car power 18650 3.7V Battery: 18650 3000mAh 3.7V rechargeable li-ion batt…|
|LingsFire® 2pcs 3.7v 18650 3000mah Rechargeable lithium Battery with PCB and 18650 Charger for led flashlight …|
|4PC 18650 3600mAh 3.7V Rechargeable Li-Ion Battery + Charger Combo
Function: smart charger for 18650 batteries, 18650 batteries for flashlight, headlight, laser pens, and so on. Designed to charge your batteries quickly and safely. Input Voltage: 110-240V, 47-63Hz Output: 4.2V 600mA Charges 1 or 2 batteries simultaneously Dimensions: 3.34 in x 1.85 in x 1.49 in Weight: 2.46 oz. Capacity: 3600mAh. Voltage: 3.7V. Can be used in laser pointer,Torch Flashlights and o…
|Welltop® 8Pcs 3.7V 18650 5000mah Rechargeable Lithium Battery with Battery Charge+ Free Welltop® Corkscrew
1. Cell type: Rechargeable 18650
2. Capacity: 5000mAh
3. Voltage: 3.7V
4. Material: Li-ion
6. Dimensions: 6.5 cm x 2 cm x 2 cm
7. Weight: 0.05 kg
|LingsFire® 2pcs 3.7v 18650 3000mah Rechargeable lithium Battery with PCB and 18650 Charger for led flashlight
LingsFire® 2pcs 3.7v 18650 3000mah Rechargeable lithium Battery with PCB and 18650 Charger
|4Pcs 18650 3.7V 5000mAH Rechargeable Lithium Battery Yellow
From the Manufacturer:
High quality and durable
Provides continuous power to your device
High energy density, long life battery
Durable in low and high temperature operations
Fit for camera, watch, calculators and other electronic devices
Dimensions: 2.56 x 0.71″ / 6.5 x 1.8 cm (L x Dia)
Type: 18650 Li-ion Batt…
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