those are the batteries on top..four of them..lithium ion..various sizes. I have four 6amp hour..and four more 2amp hour...it puts out 1800 watts continuous...PLUS...it's also a battery charger( from the wall socket..)..four at once.
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I meant what type of battery is inside the thing the smaller batteries plug into?
there is no battery inside.
inside is the electronics ..the inverter and the battery charger.
when you plug it into the wall it's a battery charger...four at once.
when it's NOT plugged in...it's an inverter...the batteries provide the power.