I have mentioned it before and will mention it again as its such a good product.
I bought a "ReZap" battery charger on ebay for 25$ (AUD), the charger is great. Not only does it charge ordinary rechargables but will charge ordinary Alkaline batteries, I usually get 10-20 charges by the time the battery has had it. Some of the cheapest batteries have lasted the longest.
This is from their
website..
QUOTE
FEATURES OF THE REZAP BATTERY DOCTOR™
* Advanced microprocessor control for safe and user-friendly operation
* Supports almost all domestic battery sizes: AAA, AA, C, D, 9V, 6V lantern, Prismatic
* Supports Carbon Zinc, Alkaline, NiCd, NiMH and RAM (Rechargeable Alkaline Manganese) batteries
* Automatic detection of different battery types and sizes
* Supports charging of mixed sizes and types of batteries simultaneously
* Extends life of Carbon Zinc, 9V & 6V lantern batteries up to 5* times
* Extends life of Alkaline batteries up to 15* times
* Recharge RAM batteries up to 25* times
* Automatic overcharge protection safeguards batteries from damage
* Built-in battery tester to measure strength of each battery
* Simple "plug and play" operation with no complicated switch settings
* Cycle life depends on factors such as brand, quality and condition of battery as well as rate of discharge,
cut-off voltage and depth of discharge of battery when in use.
So, being a very decent charger should give you longer battery life with your normal rechargables, but if you are out and buy some disposable alkalines, fear not, you can recharge them. Its not money wasted
~Fox