I think the Powerex Maha Energy chargers are some of the best available. I have the MH-C801D and it's great!
Powerex MH-C801D Charger
Powerhttps://mahaenergy.com/mh-c801d/ex MH-C801D Charger
The Powerex MH-C801D 8-Cell 1-Hour Charger for AA / AAA NiMH / NiCD Batteries charges up to 8 AA or AAA nickel-metal hydride (NiMH) or nickel-cadmium (NiCD) batteries in approximately 1 hr. Charge your batteries anywhere around the world via the included 100-240V, 50/60Hz universal AC adapter with a removable, interchangeable power cord. This power supply features a rugged DIN connector to ensure reliable contact.
I haven't been impressed with Powerex batteries however. I've purchased two sets of 8 from Universal Radio back when they were still in business. Right off the get go I noticed when monitoring the reconditioning/charging process different cells responded significantly different from each other as if they were defective. Maybe they were old stock.

I currently use Panasonic
eneloop rechargeable batteries.
What is the difference between eneloop and eneloop Pro?
The short answer:
the Eneloop Pro battery has a higher capacity than the regular Eneloop with 2500mAh vs. 1900mAh. The Pro can be charged up to 500 times while the regular Eneloop up to 2100 times. The PRO batteries can provide more current than the regular Eneloops.