CommentStreams:Be909665570eb93e2a92add94be1f420

Hi!

I have 3 stacked X-UPS1 boards. However, I seem to be unable to draw more than ~3A (12V) power output. When the combined power output rises, the "power loss detect" light starts intermittently flashing on the bottom board (not others), and the bottom batteries do not charge fully.

The PSU is enough, I have tried with 1, 2 or 3 combined 5A/12V PSU and it's the same result.

I think it is the 3A charging limit protection kicking in, but with stacked boards, it should be split among all boards?

I've also observed - when running on battery, only the bottom board batteries lose charge. Measured with multimeter, the 2 top boards batteries keep ~4.2V charge, but the bottom one slowly drops - observed 3.5V while the top boards were still charged. Should all batteries on all boards discharge evenly?

Thanks!