I'm looking for a compact travel charger with no cord to charge BLS-1 batteries for my E-PL1. All I found were some cheap looking junk. The current and voltage ratings on these chargers are all over the place. Some are 600ma, some 400ma, some 8.4v, others 8.2v. I'd like a charger that has overcharge protection and can monitor battery heat so not to overcharge. Are there any good reliable chargers out there?