Lithium battery/Inverter issue-advice?

[saflyfish]

I have a 5kva mecer inverter/charger and a single cfe 5100 lithium battery.
Until a few days ago it worked fine.
Today the eskom went off,the inverter kicked in.

Once the power came back the battery charged up normally.
The battery now however stays on for 5 min and shuts off even though fully charge?
I have performed a manual reset.

Any basic things i can try to remedy the situation?

 

[wingnut771]

Sounds like a faulty cfe battery. Watch the battery voltage.