Originally posted by Adam
Either or, as each requires a dedicated tray. Both trays are included with the grip. Lithium > Li-ion > Rechargeable AA's as far as battery life goes.
So Lithium AA's > Lithium-Ion Rechargeables > Ni-MH AA's
Got it.
---------- Post added 07-09-15 at 10:54 PM ----------
Originally posted by Scorpio71GR
On my K3 the Pentax battery gives more life than my rechargeable ones. I only use the rechargeable batteries as a back up. I find the double A battery tray for the grip to be to big and bulky to carry in my bag. I opted to pick up a couple of less expensive Wasbi batteries to carry instead. For rechargeable batteries I use Envelopes. The grip comes with a tray for the lithium battery and one for double A's and you can only use one at a time.
Michael
Makes sense. Thanks.