Is your battery often found to be flat immediately after the use? You should pay attention to some aspects:
1. Do not mix manganese batteries with alkaline batteries within a device. Doing so will shorten battery life or cause battery leakage.

2. Mixing old and new batteries will result in leakage. Therefore, you should buy all new batteries when it comes time to replace them.

3. Remove the battery from the device when it is not used to prevent battery leakage from damaging the device.

In addition, to be environmentally friendly, be sure to recycle used batteries.