Battery options for 82143A printer

[Dave Britten]

Does anybody produce a battery pack/receptacle for the 82143A printer (I believe it's the same battery pack as the topcats) with removable cells, like the ones available for the classics and woodstocks? I prefer not to risk series-charging modern high-capacity battery packs in these old machines (to say nothing of how much longer it takes when you've got about 4 times the capacity with NiMHs). And I know you can't run these printers off AC only, so I'd rather strictly use batteries and charge them in a separate "smart" charger.