Hi
I have a manual crank dynamo rechargeable LED flashlight (no brand or anything) bought 3 years ago which uses a 3 series cell 3.6V 300 mAh NiMH battery (each cell is a bit larger than LR44 button cells, wrapped in delta shape) but it is old and doesn't last more than 5 minutes without the LED dimming considerably (I crank it every time). I want to replace it with a 750 mAh 3.7V Li-ion prismatic battery from a dead cell phone but the battery is good and would make that flashlight last longer even when it was new.
Could that battery be safely used (and recharged) in that flashlight? I know that Ni-MH and Li-ion chargers use different cell voltage, but being the flashlight's original battery pack nominal 3.6V, being very close to Li-ion ones (3.7V), it might be somewhat compatible I think, but I would like to hear more opinions.
Many thanks.
I have a manual crank dynamo rechargeable LED flashlight (no brand or anything) bought 3 years ago which uses a 3 series cell 3.6V 300 mAh NiMH battery (each cell is a bit larger than LR44 button cells, wrapped in delta shape) but it is old and doesn't last more than 5 minutes without the LED dimming considerably (I crank it every time). I want to replace it with a 750 mAh 3.7V Li-ion prismatic battery from a dead cell phone but the battery is good and would make that flashlight last longer even when it was new.
Could that battery be safely used (and recharged) in that flashlight? I know that Ni-MH and Li-ion chargers use different cell voltage, but being the flashlight's original battery pack nominal 3.6V, being very close to Li-ion ones (3.7V), it might be somewhat compatible I think, but I would like to hear more opinions.
Many thanks.