EEVblog 1707 – REPAIR: Goal Zero Yeti 400 Lithium Battery

Dave’s Goal Zero Yeti 400 lithium ion battery failed. Repair time.

Forum: https://www.eevblog.com/forum/blog/eevblog-1707-repair-goal-zero-yeti-400-lithium-battery/

00:00 – Goal Zero Yeti 400 Battery failure
01:32 – Hiccuping
03:28 – Teardown
04:47 – Failure hypothesis and potential solution
05:37 – The mains inverter PCB
06:43 – The control PCB
07:36 – Dual battery connectors
08:09 – Measuring the dual battery connections to make sure they are in parallel.
08:58 – The lithium ion battery pack
09:24 – Measuring the battery pack voltage, and the under voltage lookout protection
10:49 – Re-powering just the controller board
11:38 – Progressive system module power up with the battery, isolating the mains inverter
12:23 – Measuring the battery again to see if it’s accepting a charge
13:20 – Winner Winner Chicken Dinner
15:34 – No electronics repair needed
15:54 – Goal Zero battery physical design
17:03 – Back from the gym, what’s happened?
18:33 – Fault summary

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