Charge time will vary from 55 minutes (1.3Ah battery) through to 3 hours 20 minutes (5Ah battery) depending on the type and power of your battery.Click to see full answer. Keeping this in view, how long does it take for Ryobi battery to charge?For example, these chargers charge at around 1 amp, so a dead flat 1.5 a/h battery will take 1.5 hours to charge. A dead flat 5 a/h battery will take 5 hours. The lithium batteries never fully discharge as they have a circuitry that’s prevents this overwise they will never recharge.Beside above, how do I know when my Ryobi battery is charged? Look at the LED light. When the green LED light is flashing and the red LED light is steady, the battery is charging. When the red LED is off and the green LED is steady, the battery is fully charged. Similarly, how long does a 18v battery take to charge? It features a 3-stage charging cycle that extends the life and charge of your batteries. You can fully charge them in as little as one hour.How long will a 18v 5ah battery last?To sum it all up, the bare minimum that most manufacturers expect from their batteries is around 3 years or 1,000 charging cycles. Bosch, DeWalt, Hitachi, Makita, Milwaukee, and Ridgid all warranty their Lithium-ion batteries for 2-3 years.