At present, the LED flashlight commonly used in the market, the built-in lead-acid battery is too bad, can use 4 nickel hydrogen rechargeable battery instead?
If you want to extend the battery life, the best way is to improve the charging circuit, plus a charge voltage limit, and with the charge, so that the battery life will be long. But it requires professional design and improvement. Now useful lithium battery flashlight, good life. The use of time is also very long, you may consider buying.
Its battery life is short, mainly due to charging circuit caused. At the same time, the lamp component is current limiting resistors, greatly influenced by voltage. The current limiting resistor is selected according to the 4V voltage. When the voltage becomes higher, lamp current will increase obviously. When used instead of 4 Ni MH battery when the battery voltage is 4.8V, current lamp is much greater than 4V, so the lamp of life is very short. At the same time, because the charging circuit design is very unreasonable, the battery life is also very short.
The batteries commonly used in the market for LED flashlights are lead-acid batteries, and their charging circuits are generally the simplest circuits with capacitive current limiting.
