18-Volt ONE+ Lithium-Ion 9.0 Ah LITHIUM+ HP High Capacity Battery

I just wanted to make one little correction here. Amps are current flow i.e. one coulomb of charge per second. Volts is a measure of electrical pressure i.e. how much force is moving an electron from one place to another. An amp hour is how many amps a battery can deliver for one hour with no loss of amperage or voltage. So in theory these could deliver Nine amps of current at 18 volts for one hour before the voltage (electrical pressure) or Amperage (Rate of electron flow) dropped. It's pretty much the most accurate way to gauge a battery for overall capacity but actual capacity varies based on how its used try to draw more than 9 amps and you'll get far less than an hour. Use less than 9 amps and you'll probably actually get much more than 9 amps out of the battery.

I can't comment specifically to THESE batteries BUT I had an older (blue) 18v "leaf blower" lose the impeller. Motor still worked fine but the plastic impeller broke AT the motor shaft, perhaps from the heat of overuse? I try to run only one batt at a time (4Ah) out of my similar but newer (green) blower and then let it cool down.

I’m a 60+ female, not at all knowledgeable about lawn tools and such but I can tell you this. The 6Ah battery has more power and lasts so much longer than the 4Ah battery. I can easily handle it even though it is slightly heavier than the 4Ah plus the 2 pack batteries cost only $20 more than a single battery. It’s an unbelievable deal.

The lithium batteries DO require the correct type of charger made for lithium batteries. All of my chargers that are of different designs and sizes, but are made for lithium batteries, will charge any of my batteries. This includes 1.5 ah all the way to 6 ah.....but it does take longer to fully charge the larger ah batteries.

Im charging 2, 4 & 9 Ah batts in several chargers - the p117 and a couple of the small chargers tgat usually come with the tools. They all work just fine - if the charger is designed for the 18v ONE+ system it should be fine.

YES I HAVE ABOUT ALL THE RYOBI 18V ONE TOOLS AND I USE THESE BATTERIES ON ALL OF THEM.

Yes, plus motor overload / overheat protection.

A lithium ion battery can be charged as fast as 1C, whereas a lead acid battery should be kept below 0.3C. This means a 10AH lithium ion battery can typically be charged at 10A while a 10AH lead acid battery can be charged at 3A. The charge cut-off current is 5% of the capacity, so the cutoff for both batteries would be 0.5A. Therefore if Ryobi made a 9am charger it would charge in ONE hour instead of 6. But they do not. The way around it is to buy a couple batteries or more, charge them all up before starting to work, and have one charger for each battery this way while working your charging. If your an onsite working where there is no electricity (hence the reason for battery operated tools) get a power inverter, 600 watt should work and charge off of your work truck. You do not need a pure sinewave inverter modified is just fine as the chrger will just change it back to dc anyway.

Hello! Thanks for the question! The 9.0Ah battery fits into a most recently produced P1100 18V mower.

Yes, you will see a noticeable improvement in performance.and longevity.