I CHARGE BATTERY BUT IT WONT HOLD CHARGE

Rechargeable lithium batteries have a half-life of about three years. That means half of the capacity is gone is three years - another quarter in another three years. Replacement batteries can be found online. Even if your battery is not that old, this is the most likely reason for short run-life.
It is often possible to get the chemicals in the battery refilled by an online vendor. This is not only cheaper and makes the battery, literally "better than new", but is also easier on the environment.