Product Overview Model HP6‑4.0 WEESUN 6V 4.0AH lead‑acid battery is engineered for low‑power DC devices. Its maintenance‑free sealed construction prevents electrolyte leakage. It works well for both cyclic power supply and float standby applications. Charge voltage ranges: 7.20‑7.50V for cycle use, 6.75‑6.90V for standby use. Clear specifications simplify charger matching. Ideal for children electric toy cars, emergency lights, surveillance accessories and small lab