For Ryobi For Ryobi 36V/40V 6.0Ah OP40601 Li-ion Battery Replacement Compatible With RY40502... BATCDO72548 0 Review(s)  £75.99 100% Perfectly Compatible: 40V, 6Ah lithium-ion has no memory effect. True capacity, more powerful than normal batteries, ideal replacement for old original Ryobi batteries. Safe and reliable: reliable and safe. A qualified battery can provide a powerful backup for your tools and help increase your productivity. Add to cart