DIY: Electronic Scale Lithium Battery Upgrade

If your electronic scale's battery life is getting shorter and it runs out of power just a few days after a full charge, you might want to consider upgrading it. By replacing the old battery with a lithium battery, you can avoid the hassle of frequent recharging.

Main Subject: Electronic Scale

Supporting Role: Lithium Battery Charging Board

The disassembled electronic scale originally used a lead-acid battery.

Electronic Scale Control Board

Removing the lead-acid battery, which was labeled as manufactured in August 2015.

The back of the scale shows it's an upgraded version.

Here's the lithium battery after modification.

The lithium battery charging board uses a TYPE-C connector.

First, solder the connection wires.

This is what it looks like after modification, with the charging port now on the right side.

The original charging port was on the back, making it inconvenient to charge. Moving it to the front makes charging more convenient. The modification is complete and the scale powers on perfectly.

Regarding the low voltage alarm issue, the original lead-acid battery was 4V, and the voltage of the new lithium battery is roughly the same.