In all cases apply the vehicle and battery manufacturer's battery management rules before those suggested here. Below are simply more general suggestions which may help ensure longer battery life but may not apply to your battery and/or vehicle,

• Recharge Lead Acid batteries immediately after use.
• Remove batteries from charger after recharging.
• Recharge batteries after 30 days even if unused.
• DON'T completely discharge either Lead Acid or NiMH batteries.