Depends on the battery, IME/IMO. A lot of batteries intended for automotive or motorcycle use have built in electronics now to monitor the battery's charging cycle to prevent overcharge or high heat situations. Otherwise, we couldn't use them in everyday auto or M/C applications as the charging systems on them do not support the specialized Li-ion charging requirements. As long as your normal charger has an automatic shut off instead of reducing output to a trickle charge to the battery then it will work with the aforementioned electronically protected batteries. A specialized charger sure won't hurt but isn't absolutely necessary.
