u/Ch33se_H3ad

Bought a tool this morning and got a 2Ah battery and charger for free with the tool purchase. Took it home and put the battery on charge. Charger says the battery is charged but I only have 3 bars on the battery. Tried 2 other chargers I have and they all said the battery is charged. Could the 4th battery light on the battery not work or is it an issue with the battery?