Hi I bought a 4200mAh Lifepo4 battery from hobbyking (see thread ZIPPY 4200/8200mAh LiFePO4 battery supply? - #60 by MM0FMF )
This powers the G90 for ages on a summit. There are supply issues at the moment if you read the other thread. I also have 16Ah & 24Ah Lifepo4 “golf trolley” batteries for marathon activations or when I use my ft857. The G90 is not as robust as the Yaesu products, however with a little care it should last for years.
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