07-08-2011, 05:27 AM
They're a bit dear, but Lithium batteries will give you much more life than alkalines. If you know you're going to be shooting all day, it might be worthwhile investing in some.
If you want a rechargeable battery, rather than regular NiMH batteries, you could look at low self-discharge rechargeables like Sanyo Eneloop batteries. They don't suffer the same voltage drop under load that regular NiMH's do, and will give you (apparently) up to 4x more life than regular rechargeables. NiCads may work, but they're getting harder to find, don't come in the large capacities that NiMH's do, and are relatively environmentally-hostile compared to NiMHs.
If you want a rechargeable battery, rather than regular NiMH batteries, you could look at low self-discharge rechargeables like Sanyo Eneloop batteries. They don't suffer the same voltage drop under load that regular NiMH's do, and will give you (apparently) up to 4x more life than regular rechargeables. NiCads may work, but they're getting harder to find, don't come in the large capacities that NiMH's do, and are relatively environmentally-hostile compared to NiMHs.