toolboy's Corner: Ryobi 18v Chargers

Click here to check out all of toolboy's items for sale on eBay


Main Page    18v Batteries    Battery Chargers    Cordless Tools    Battery Rebuilds, etc.


Model Chemistry Supported Appearance Charge Time Features Comments
P110 Nickel Cadmium 1 Hour
  • 6 foot power cord
  • Charges NiCad packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • Lithium Ion batteries cannot be charged on the P110 charger
  • P110 Manual (238 KB)
P111 Nickel Cadmium Overnight
  • 6 foot power cord
  • Charges NiCad packs overnight
  • This is NOT a 1-hour charger!
  • Lithium Ion batteries cannot be charged on the P111 charger
  • P111 Manual (611 KB)
P113 Nickel Cadmium, Lithium Ion 1 Hour
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • P113 Manual (1,522 KB)
  • Update 12-Jul-2010:
    In May 2010 Ryobi started distributing new P113 chargers WITHOUT the built-in strain relief boot on the power cord (shown in photo). NOT cool, Ryobi!
  • Update 14-Aug-2010:
    It seems that the newer chargers will charge ALL Ryobi batteries, but that the older chargers might not. See the "Why won't my charger charge my battery?" section below for details. This is really sad, it's no longer true that a P113 will charge any 18v battery.
P114 Nickel Cadmium, Lithium Ion 1 Hour
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • IntelliPort design won't overcharge a pack and saves energy, like the P125
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • P114 Manual (2,292KB)
P115 Nickel Cadmium 1 Hour
  • 6 foot power cord
  • Charges NiCad packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • IntelliPort design won't overcharge a pack and saves energy, like the P125
  • Lithium Ion batteries cannot be charged on the P115 charger
  • P115 Manual (2,194 KB)
P116 Nickel Cadmium, Lithium Ion Overnight
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs overnight
  • This is NOT a 1-hour charger!
  • IntelliPort design won't overcharge a pack and saves energy, like the P125
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • P116 Manual (1,672 KB)
P117 Nickel Cadmium, Lithium Ion 30-Minute?
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • LED to indicate if battery is too hot or too cold to be charged
  • IntelliPort design won't overcharge a pack and saves energy, like the P114 and P125
  • P113, P114, P117, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P103, P104)
  • P117 Manual (1,063 KB)
  • Ryobi now refers to this model as a "30-Minute" charger, but it's just as fast as all the others (except the P118)
P118 Nickel Cadmium, Lithium Ion 1 Hour?
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • IntelliPort design won't overcharge a pack and saves energy, like the P114 and P125
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • Ryobi refers to this model as a "1-Hour" charger, but it's charge rate is 1/3 slower than other "1-Hour" chargers
  • P118 Manual (2,450 KB)
P120 Nickel Cadmium 1 Hour
  • Dual Bay charger -- charges two battery packs at once!
  • 6 foot power cord
  • Charges NiCad packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • Lithium Ion batteries cannot be charged on the P120 charger
  • P120 Manual (457 KB)
P125 Nickel Cadmium, Lithium Ion 1 Hour
  • Power On-Demand, Up to six charged - 18V ONE+ batteries available on-demand.
  • Maximizes Battery Life - Charges stored batteries only as needed, which protects the batteries’ cells and maximizes life.
  • Conserves Energy - EnergyStar® qualified system enters Energy Save Mode to conserve energy when not charging or maintaining batteries.
  • Indicator lights show battery and port status as batteries are charged and maintained or when status button is pressed during Energy Save Mode.
  • 6 Port Supercharger - reduces workspace clutter.
  • Quick-release wall mount bracket (included) securely mounts to wall, organizing and maximizing work space.
  • Batteries lock securely into place for easy transport.
  • 1 HR CHARGE - Charges each 18V ONE+ battery, one at a time, in one hour or less.
  • Maintenance Mode - Batteries stored on charger are conditioned for peak performance.
  • Energy Save Mode - EnergyStar® qualified system saves energy, protects battery cells, and maximizes life
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs in 1 hour or less
  • Diagnostic LED lights help indicate the status of the battery pack
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • Charges ONE BATTERY AT A TIME. So if you plug in six depleted batteries at once it will charge the first in under an hour, then charge the second, and so on. It would take up to 6 hours to finish charging six completely drained batteries. Not at all bad, just don't think that it will fully charge six depleted batteries in one hour, 'cause it won't.
  • P125 Manual (2,057 KB)
P130 Nickel Cadmium 1 Hour
  • In-Vehicle charger
  • Plugs into vehicle's 12V DC outlet for flexibility to charge batteries when power is limited
  • Charges NiCad packs in 1 hour or less
  • Protective circuitry audibly warns you and shuts down charger if vehicle's battery is too low
  • Diagnostic LED lights help indicate the status of the battery pack
  • Lithium Ion batteries cannot be charged on the P130 charger
  • This charger is actually rated for battery packs 7.2v to 18v, so it can be used to charge packs at other voltages. (I once owned a P130 and used it to charge both 12v and 18v packs.)
  • P130 Manual (873 KB)
P131 Nickel Cadmium, Lithium Ion 1 Hour
  • In-Vehicle charger
  • Plugs into vehicle's 12V DC outlet, giving you the flexibility to charge batteries while driving or when access to power is limited
  • Compatible with all Ryobi 18v One+ batteries
  • Charges battery packs in 1 hour or less
  • Protective circuitry gives audible warning and shuts down to prevent draining your vehicle's battery
  • ChargePlus technology provides battery and charging status feedback using LEDs
  • P113, P114, P117, P118, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • P131 Manual (1,532 KB)


Why won't my charger charge my battery?

Sometimes a perfectly good battery won't charge in a perfectly good charger. Here are some tips:

How long will it take my charger to recharge my battery?

There's no straight answer to this question. Recharge time depends your battery's capacity, it's age/usage, how much it was discharged, temperature, and even which model of charger is used.

The "1-Hour" chargers tend to charge a fully depleted battery at a faster rate than a nearly fully charged battery. The data I have suggests that the charge rate can be a little faster at the beginning of the cycle than near the end of the cycle. But for the rest of this section let's simplify the description of how battery capacity affects charge time by assuming that the all chargers operate at a constant charge rate. Let's also assume that all batteries are fully depleted before starting the charge cycle and fully charged at the end of the charge cycle, and that the battery and charger are at room temperature.

Battery Capacity
I have actually timed how long it takes to charge a P102 battery (1200mAh) on P114, P117, P118, P125, and P131 Chargers. (I no longer own a P113 or a P116.) The data indicates that the P118 is the slowest of these chargers, taking about 51 minutes. The P114, P117, and P125 gave very similar results and each took about 33 minutes. I had difficulty getting consistent results with the P131, where charge times ranged from 30-37 minutes. This may because I performed the P131 testing under normal driving conditions, including stops where I turned off the engine, so I guess the fluctuating input voltage affects the charge cycle. But still, it seems to perform at about the same rate as the P114, P117, and P125. Therefore the P118 delivers an average charge rate of 1200mAh/51min*(60min/1Hr) = 1412mA/Hr, and the P114/P117/P125/P131 chargers deliver a charge rate of 1200mAh/33min*(60Min/1Hr) = 2182mA/Hr. We can therefore extrapolate the charge time of a 4000mAh P108 battery. On a P114/P117/P125/P131 charger this would take 4000mAh/2182mA/Hr*(60Min/1Hr) = 110 min, and on a P118 charger this woudl take 4000mAh/1412mA/Hr*(60Min/1Hr) = 170 min.

Testing this theory, I clocked the charge time of P108 batteries on P114 and P118 chargers. Testing two P108 batteries with a P118 charger, the times were 166 and 161 and minutes, very consistent and very close to the 170 minute estimate. (Yes, that's just under THREE hours!) On the P114 charger, the times were XX and YY minutes. I created the following table to estimate the charge time for all of the Ryobi 18v batteries on various chargers:

Battery Rated Capacity
(mAh)
Charge Time
(Minutes)
for models P113, P114,
P117, P125, and P131
Charge Time
(Minutes)
for P118
P102 1200 33 51
P103 (old) 1300 36 55
P107
P103 (new)
1500 41 64
P100 1700 47 72
P105
P104 (old)
2400 66 102
P104 (new) 2600 71 110
P108 4000 110 170


As a rule of thumb, one could say that the P118 is 1/3 slower than Ryobi's other "1-Hour" chargers (or that others are 50% faster). Some may ask why the P118 charger is slower. I sure don't know. But I actually appreciate this difference. In most cases I'm in no hurry to recharge a battery, and it's "healthier" for batteries to be charged at a slower rate because doing so means less heat/less stress and greater longevity. If you need your battery charged as fast as possible so you can get back to work, then use a P114, P117, P125, or P131 charger. (Note that I don't recommend the P113 as it lacks the IntelliPort feature.) In all other situations, the P118 is probably a better choice.

It should be noted that the times in the above table are not only approximate, but that typical charge times will be shorter. Why? The testing I performed was using new or nearly new batteries. I tested each battery to ensure operation at full capacity (all measured 98-99% of rated capacity), and each was carefully discharged down to 14v prior to measuring the charge cycle time. Unfortunately, battery capacity decreases with age and use, and for most users a battery is recharged before it has been completely discharged (commonly called "depth of discharge"). These factors will result in a nearly proportional decrease in charge time. For example, a battery that was discharged only 50% will require half the time in the table above to reach a full charge. And an older/used battery that can only attain 85% of its original charge level will require 15% less time to reach a full charge after being completely discharged.

Ryobi has started advertising the P117 as a "30-Minute" charger. The table above ad the preceding paragraph suggest that for the P102 battery this claim is true (and it's arguably true for the other compact Lithium Ion batteries). However, Ryobi's full-size batteries will take about an hour to charge, and the P108 will take nearly two hours.

Main Page    18v Batteries    Battery Chargers    Cordless Tools    Battery Rebuilds, etc.


This page brought to you by eBay's TOOLBOY
Click here to check out all of toolboy's items for sale on eBay
Last revised 14-Jun-2014
Counter