Under normal circumstances, the lead-acid battery of an ordinary flashlight can be replaced with a lithium battery, but the following problems should be noted:
1. lithium battery matches lead acid battery, otherwise it may damage the flashlight or lithium battery.
2. Lithium batteries require special protection circuits because overcharging or overdischarging lithium batteries can cause safety issues. A printed circuit board with protection functions is therefore necessary.
It should be noted that when replacing batteries, safety should be ensured first, especially when the internal space of the flashlight is small, batteries that do not meet the standards of Safety should be avoided to avoid accidents such as fire or explosion. Also, if you don't know how to replace the battery or have any questionsRegarding battery safety, it is recommended to seek advice from professionals or relevant agencies.
Lithium battery rechargeable flashlight
Since the lithium battery charging is very strict and must be accurate to 4.2 volts plus or minus 0.05 volts, it is recommended:
1 . Use Charge the flashlight with the original charger.
2. Use a regulated constant voltage power supply with an output of 4.2 volts for charging.
3. Or other special chargers for lithium batteries.
4. If you really have no choice, you can also purchase a “universal charger” to charge cell phone batteries.
It can be used
The limited high voltage of lithium battery is 4.2V. The voltage of 4.3V will be 0.1V higher than that of 4.2 V, which will actually affect the voltage. battery
However, lithium batteries soUsually shipped with a battery protection board. Generally, the overload protection voltage of the battery protection board is 4.25V (plus or minus 0.05V)
So yes. the voltage reaches the charging protection voltage while charging, it will stop charging, so it will not affect the battery
It will only prevent the charging from reaching 100% and the charging capacity is estimated at around 90-95%.
Lithium batteries with battery protection plates can therefore be charged with a 4.3 V charger