Mugen Power, good reputation, has a BP-4L repacement that's 1800mAh for less than $30. It's 300mAh more than the stock battery. I'm also looking for a standalone battery charger but won't buy anything with PayPal. Recently I neeeded PayPal for a credit card purchase online. I started entering my info and without warning me before the purchase was submited told me they'd just charged my AMEX $1.95 to verify my credit card for PayPal membership. I didn't complete the purchase and when I got my AMEX bill I had that charge removed as unauthorized. AMEX didn't even ask any questions they just did it. Love AMEX -- hate PayPal. I provide Google checkout on my sites. Google verified my merchant account by depositing a $1 dollar of their money as a credit card deposit to my account.