P14-42 and P45-275 are power zooms. with Olympus there is the O14-42 and the O12-50.
Panasonic has a 45-175/ f4 - 5.6 that can either be manually or power zoomed.
OEM batteries and chargers generally have 4 or 5 contacts. The 4 contacts are for +, -, Temp and current draw. The cheap aftermarket chargers only have + & - contacts. They don't have the circuitry to monitor Temp or Current draw; this makes them a potential fire hazard. Battery contacts are required to be recessed so that the + & - contacts can't be shorted if they come in contact with something like a metal coin in your pocket. I have never had an OEM Olympus, Panasonic, Nikon or Canon battery swell up to the point that I've noticed any difficulty getting them in or out of a camera. Every cheap aftermarket battery I've had could be used as a dreidel after a couple of years (it's Hanukkah now...).