Does it do wheel bolts?
Depends how long they have been on, generally shifts them if only recently been off, no matter on state of charge. If they've been on a while, the batteries need to have recently come off the charger.
The reason I'd replace it is I have a spare charger and battery for it, and because its "only" around £100ish on VAT free. Its a Sealey device.
I'm tempted to get a smaller bodied one as well, for the extra flexibility, but a lot of the smaller bodied ones I looked at when I bought mine were poor from a power point of view, and were (with batts/chargers) the wrong side of £200
The Snap-Off big boy is desired, due to its genuine power and trigger controled speed, but the cost makes it difficult to justify.
As you point out, ShitFix cordless drill deals are usually to shift old stock, and that invariably means an obselete battery/charger.