2 small R/C off-road trucks. Need charger. (Hivings Hill) (Pond Park HP5)

I picked these up a few years ago but never got around to doing anything with them.

They are 1/16 (I think) scale off-road trucks with the older-style 6-channel radio gear.

I can’t remember if they came with a charger and I lost it or if they didn’t have one. I think the battery connector is a standard one so you could source a replacement charger or just change the batteries and get a charger to match.