Just a quick note about my apparent obsession with rechargeable batteries. Â I wanted to talk about pairing up your NIMH batteries. Â Science junk aside, NIMH like to work in sets of evenly worn and charged cells. Â Alkaline batteries were much the same, however, since they got tossed at the end of their use, it wasn’t as big of a deal. Â However, when you are working with eneloops rated at 1000 charge cycles, killing out that $11 set of batteries probably isn’t the best idea. Â I just put a piece of masking tape around the battery and mark it with a unique name for the set, and an auxiliary number that marks the cell. Â For instance as previously mentioned I use 8 AA eneloops in my D300. Â I have marked them as MB1 and MB2 (the grip is the MBD-10) and then each cell is numbered as 1-8. Â The individual numbers allow me to trace weakening cells to one problem cell and the larger set can be replaced with a new set while the other set is broken down to fuel remotes and other single and dual cell devices.