Users of regular Ni-MH rechargeables will be aware of the self-drain they suffer, where a fully charged battery seems to go flat before it's been used for very long. This is annoying in high-drain devices like digital cameras.
These Hybrio batteries are an alternative (another being Eneloop) that improves upon regular rechargeables by maintaining their charge for longer (70% after a year is claimed). Although these are 2100mAh and thus have only 78% of the capacity of 2700mAh rechargeables, they are more suitable for the occasional camera user who will not use the full charge in a hurry.
If you're a high intensity user I believe that regular, higher capacity Ni-MH rechargeables will be more suitable, although these Hybrios would still make excellent back-up batteries.
The supplied charger is a slow trickle charger that'll take 16 hours for the included batteries, which is fine if you're happy to leave it on overnight. I have charged them with a faster charger and not had a problem. All in all an excellent set.
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