According to the different quality performance of the product, the difference is generally roughly 3 to 5 hours, the biggest impact on the charging battery life is overcharge and overdischarge, so it is best not to wait until there is no electricity and do not charge the time is too long, and the time is roughly estimated under the use of almost no electricity. In addition, it is best not to use led lamps. It is best to use incandescent lamps. led lights are not good for eyesight.