THESE COST WELL UNDER A PENNY FOR EACH CHARGE INCLUDING BUYING THEM IN THAT PRICE.
This is the best price I have seen for AA and the second best for AAA, but the best currently available.
Hybrio batteries come ready charged - so you can use them like buying new traditional batteries (primaries). They differ from normal rechargeables in that they do not discharge as quickly when not used - and will retain 80% of their charge after 6 months - and 70% after a year (their own figures from the packaging - but there is no shortage of people in the forum using them and no shortage of praise).
These batteries have only about 78-80% the capacity of new high spec rechargeable batteries - but will remain charged when little used - so are most suited to clocks, remotes, calculators, bike lights if you don't cycle often, torches, radios, or to replace batteries in cordless phones that are seldom used/charged. They will work fine in items with higher power requirements too - as their capacity is on a par with reachargeable batteries from about 18 months ago. But for things like this you are really better buying 2700mAh traditional rechargeables.
These are 2100mAh for the AA and 800mAh for the AAA. They can be recharged up to 500 times, so with a decent charger and at a fraction of a penny to charge them are a tiny cost compared to normal alkalines etc - so UNDER A PENNY FOR THE ELECTRICITY TO CHARGE AND THE SHARE OF COST OF BUYING THE BATTERY.
They also take up as little as 0.2% of the space in a land fill.
Lets be honest, you really need to be a plonker to not be using rechargeable batteries by now - and these come ready charged from the pack. There are extremely few things that only require traditional primary cells.
Its £1.24 per battery and a fraction of a penny per charge. Each time you use and recharge one - its costing less than a penny in power and to pay for the battery.
Got the message yet? Go for it!!!
You know it makes sense - or do you like paying a fortune for batteries?
Lastly, if there is something about this you would like explained then ask here or send me a message. People show intelligence by realising they need information when they don't know something - rather than thinking its easier sticking to what you are doing instead of looking at newer potentially better options.