So you must be wondering, should I buy the Powerex 2700 or the Powerex Precharged?
If you need the extra capacity and will be using the batteries fresh off the charge, then, please use the Powerex 2700.
If you let the Powerex 2700 sit around for 4 days, the battery will self-discharge to less than 2600mAh, so it would be less than the capacity of the Precharged. So if you want to have a battery that is virtually maintenance free and ready to use even weeks or months after you've charged it, the answer would be Powerex Precharged!
Available on Amazon here: http://amzn.to/1RTh6H2