has indicated. Typically the Lithium Polymer will lose 20% capacity/year at 25C. This can be reduced to around 2-5%/year if the battery is stored in a cool location i,e in the Loft space during winter when not in use and in the Fridge during the summer when not in use.
So you have to factor the cost of replacement batteries into the total cost of ownership. How much does a replacement battery cost.
This is why I standardize on AA's for things. Instead of buying the GPS with a lithium ion battery and needing its own charger I bought the one that needs two AA's. Same with the scanner, digicam, etc. Now I just swap out those batteries and put them into the AA charger thats shared between everything.
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