If you have a Lester battery charger, yes, your batteries are completely charged and this is normal. Every time you plug in a Lester automatic battery charger, there is a sampling to get a reading of the batteries' voltage. The amps will shoot up, but then after a few minutes drop down quickly to the low single digits for a while (maybe 30-40 minutes). This is standard. The charger doesn't know immediately when you plug it in that you just charged the golfcart and that the volts are up; it needs to test them. Think about it like the charger has "amnesia" every time it gets plugged in to your Club Car, EZGO, Yamaha or other golf cart.