6V 4.5Ah Universal Sealed Rechargeable Lead Acid Battery - No Spill Toys Cars

6v 4.5ah (as 4ah, 4.2ah & 5ah). It features AGM chemical composition and a no-spill design, making it safe and easy to use. Ultramax NP4.5-6, 6v 4.5Ah Sealed Lead Acid - AGM - VRLA Battery. Absolute security from electrolyte leakage, Oxygen Recombining.

eBay