Model AC840087


  • Up to 4X more runtime compared to standard lithium-ion batteries
  • Over 2 X longer life compared to standard lithium-ion batteries
  • Best-in-class extreme weather performance in temperatures as low as -4° and up to 120°F
  • Onboard fuel gauge lets you know your battery level before you start a job
  • Backwards compatible with all RIDGID 18-volt tools and lithium-ion chargers


Assembled Depth (in.) 7.00 in
Assembled Height (in.) 7.00 in
Assembled Width (in.) 5.00 in
Battery Type Required Lithium Ion
Rechargeable Yes
Voltage (volts) 18

Rated 2.7 out of 5 by 9 reviewers.
Rated 5 out of 5 by Excellent product I have used my Ridgid drills for years with no problems. Finally, one of the four batteries that came with the set stopped recharging. I took it to Home Depot. They replaced it on the spot with no questions asked. What more could I want? November 10, 2015
Rated 1 out of 5 by Poor warranty and quality I work and purchase for a HVAC and PlB contractor we have purchased a couple of dozen Ridged tool kits and have 4 times the failure with the Ridged as apposed to the milwaukee tool kits and the warranty is a joke they do all they can to make it as difficult as possible to get anything warrantied and if the STICKER falls off there is no warranty (yeah they put the serial # on a sticker) I am all done with buying any Ridged battery tools The batteries and chargers fail at an alarming rate. The Ridged batteries are also more susceptible to cold weather failure than the other tools we use as well. August 7, 2015
Rated 1 out of 5 by Can't even charge the battery. Just bought a new charger and (2) new 4.0 AH batteries to use on a job tomorrow (circular saw - framing steps) and one battery has been sitting on the charger for over 3 hours and it is still flashing 2 LED's. Luckily I bought a Milwaukee Circular Saw as a back up and I have (2) 4.0 AH batteries that I have for a rotary hammer. Those batteries charge within 70-90 minutes from completely drained to fully charged. If this battery charger doesn't charge these new batterie(s) over night I will return the batteries and the charger and go with Milwaukee. What could be defective? Batteries or Charger?. Will post an update in the next day or two. Will use other ridgid chargers that came with the (2) x4 drills that I own. May 26, 2015
Rated 5 out of 5 by Great battery I can't understand the few complaints there are with this battery, I've had two of them now for 3 years and they're both going strong. I did follow the directions, I find this usually helps! Also note these batteries are Lithium-ion batteries, they DO NOT need to be fully charged and fully discharged before being fully charged again because they do not have a memory like the old nickel-cadmium batteries, thus you can recharge the battery anytime you want regardless of rate of discharge.. You do need to fully charge the battery when you first get the battery. Based on what I heard from a battery company, I did for the first time fully recharge and fully discharged 3 times before treating it however I want. Ridgid does not mention this in their operating instructions so someone could e-mail them directly and find out more about this, but since it is Li-ion it won't hurt it either to cycle the battery fully the first 3 times. March 3, 2015
Rated 1 out of 5 by Batteries don't last We have replaced four batteries because they don't last. they lose their charge quickly or don't have the ability to recharge within two years. Yes, they are continually charged and maintained. Under the same environment and treatment, my old Craftsman battery has lasted for seven years. Remember to register your battery for either the Three year or Lifetime warranty depending on what size it is. These batteries are not dependable although the Tools have been a pleasure to use and have lasted quiet well. I can't endorse a product that continues to push subpar batteries which are the money maker. Home Depot was helpful to assist with the batteries that have been under the warranty, but that takes time to receive in the mail. December 3, 2014
Rated 4 out of 5 by works good I like that this battery holds it charge even in the cold weather where the older ones always need to be charged again in the morning. November 25, 2014
Rated 2 out of 5 by 119 dollar battery do not last! have this drill with the 4 amp battery and use very little. Used it to attach to my ice auger. Was fine last year (drilled maybe 10 holes) no problem. This year 3 holes battery goes dead. Take home to charge, charger says battery toast. There may be an hour on the battery total since I bought it. No support, no info on battery. Website seems very vague with anything to do with the batteries. Most expensive out there. February 1, 2014
Rated 1 out of 5 by Does not fit all chargers The packaging and everything online says this battery fits ALL ridgid lithium ion chargers. Unfortunately that's not the case. We have an older model that has worked with all batteries we have (which are mostly not working anymore), but unlike what ridgid says, this battery will not fit. January 28, 2014
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1 Question | 2 Answers

Product Q&A

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2 years ago
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All RIDGID 18V platform tools and batteries are interchangeable. However, RIDGID 18V Lithium Ion batteries do require their correct charger.
2 years ago
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No, it only will work with 18 volt Ridgid cordless products only.
10 months ago
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Indiana, United States
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