Not OP, but I got one of these for free from a colleague 5 years ago and it's st...

Not OP, but I got one of these for free from a colleague 5 years ago and it's still going strong: https://www.amazon.com/dp/B002HWS9FW/ref=cm_sw_r_cp_awdb_t1_...

Paired with a good charger and an extra set of rechargeable batteries it's a joy to use. Best health "investment" I've done in recent years.