This Battery monitor is designed for lithium batteries and will be more accurate then others available.

• Free app for both iOS & Android, IOS: IOS 7.1 and Later Available: Android 4.3 and Later
• Connect with battery directly, no code
• Check battery state on phone APP via Bluetooth 4.0 when device is installed
• App Name: Battery Monitor BM2​​, please scan machine backup or user manual scan code to download software