The Ryobi battery and charger from Power Adhesives have been designed to be used with the b-tec 807 cordless glue gun.
The battery has a 4 stage fuel gauge which gives you an excellent indication of the charge that you have left. Meaning that you can prepare your workload and plan when to recharge the battery.
The 18 V 1.5 Ah lithium+ battery recharges in around 60 min using the corresponding charger. The green light on the charger stops flashing and shows green when the battery is fully charged and ready to be used.

Charge the battery overnight on the first charge.
Always use the correct battery with the charger.