Roku remote battery drain

Is there a product available, (or of not, May I make a suggestion) that instead of buying standard batteries, you can buy a one time rechargeable unit? Not loose rechargeable batteries themselves, but a single device that would fit in the roku remote battery compartment.  I.e. the X-box controllers are "loose" battery installed, but instead of buying loose alkaline or ni-cad batteries, you can buy a rechargeable battery pack that fits perfectly into the battery compartment. I know lots of ppl that would purchase that in lieu of lots of loose batteries hanging around everywhere.