https://www.ebay.com/itm/XXX/127858...customid=15054b8a65bc11f1a437b2e458b238080INT 2-Pack ECO-WORTHY 102Wh 12V 8AH LiFePO4 Lithium Battery for UPS on sale for $49.99 - $10 (20%) off when you apply coupon code FAVEDEAL20 on the checkout page = $39.99. Shipping is free.