Take the charger back to wallyworld, I made that mistake. I kept wondering why my batteries weren't lasting and finally it turned out to be the charger. Go look at a charger by lacross or maha and get one of those, trust me it will save you $ in the long run as the $ you saved with a walmart quality charger will easily be made up replacing batteries sooner than necessary, I had some that didn't even last a year, then I bought a real charger and have been fine since. I quit using rechargeables for a couple years it was so bad.