toolboy's Corner: Ryobi 18v Chargers

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Main Page    18v Batteries    Battery Chargers    Cordless Tools    Battery Rebuilds, etc.
NEW!   The Ryobi P102 Battery


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 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
  • 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)
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)
  • P118 Manual (2,450 KB)
P119 Nickel Cadmium, Lithium Ion Overnight
  • 6 foot power cord
  • Charges NiCad or Lithium Ion packs overnight
  • Diagnostic LED lights help indicate the charge status of the battery pack
  • P113, P114, P117, P118, P119, P125, and P131 are the only chargers that can charge Lithium Ion battery packs (P102, P103, P104, P105, P107, P108)
  • P119 Manual (900 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 charge my battery?

Well, that's a difficult question to answer. Recharge time depends on the charger, the model of battery, how far the battery has been discharged, the age of the battery, the ambient temperature, and other factors. Let's assume that we're talking about a best case scenario -- brand new batteries which have been fully and gently cycled 3-5 times. (Side note: The transit time from Ryobi's factory in China into your hands in the USA is likely to be 2-3 months. So a truly "new" Ryobi battery means it was manufactured no more than 3 months prior.) Let's further assume that our new batteries have been fully discharged, and that they and the charger have been at rest just long enough to reach the ambient temperature of 75degF.

Under the above conditions, recharge time should be proportional to the charge rate of the charger. So to perform a calculation we just need to know the charge rate for each model of charger. My testing indicates that the P113, P114, P117, P125, and P131 chargers have a charge rate of about 2.1A and that the charge rate of the P118 is about 1.4A. So one could say that the P118 is only 2/3 as fast as the other "one hour" chargers, or that most of the "one hour" chargers are 50% faster than the P118.

Let's equate this into actual clock times for different Ryobi batteries. A P102 battery contains 1300mAh cells, but my testing shows that they behave as if they were 1200mAh. Using a P118 charger, the rechange time would be 1200mAh/1400mAh = 0.857 hours = 51 minutes. With a P117 charger, the time would be 1200mAh/2100mAh = 0.571 hours = 34 minutes. Following this logic, here's a table of theoretical recharge times for various Ryobi batteries on P117 and P118 chargers:

BatteryCapacity (mAh)Recharge Time
P118 (mins)
Recharge Time
P117 (mins)
P102 1200 51 34
P103 (old) 1300 56 37
P103 (new) 1500 64 43
P107 1500 64 43
P100 1700 73 49
P105 2400 10369
P104 (old) 2400 10369
P104 (new) 2600 11174
P108 4000 171114


Yes, you're reading the chart above correctly if you're realizing that it takes 171 minutes to recharge a fully depleted P108 battery on a P118 charger, or just shy of 3 hours! On a P117 charger, it would take just short of 2 hours to recharge a P108.

Remember, as the above "ideal" conditions change, the recharge times actually get SHORTER, not longer. Why? It's because virtually every change one could make to the "ideal" conditions will mean a DECREASE to battery capacity. And if the battery's capacity is decreased, then so is the rechange time. Think about it -- how often does a consumer hit the above "ideal" conditions? Most of the time a battery won't be fully depleted before it's put back on the charger to "top it off". If it's only been used half way, then the charger only has to deliver half a full charge, and the recharge time is cut in half. Or an older battery may only operate at just 80% of is rated capacity, and if so the full recharge will decrease by 20%. Pair these factors together and the recharge time is even less. For example, let say we have an older P102 battery operating at 80% capacity (1200mAh * .8 = 960mAh) and we discharge it half way (960mAh / 2 = 480mAh). Recharge time on a P117 is 480mAh/2100mAh = 0.229 hours or 14 minutes, and recharge time on a P118 is 480mAh/1400mAh = 0.343 hours or 21 minutes.

Some words about the P117 charger

The P117 charger was originally marketed as a "one hour" charger, but later Ryobi changed the claim to a "30 minute" charger. From the above information it could be argued that both claims are correct. When the P117 charger was released, Ryobi only had the P100, P103, and P104 batteries, for which the full recharge times are 49, 37, and 69 minutes, respectively. So the "one hour or less" claim makes sense.

Later, Ryobi released the P102 and now this battery is being marketed as Ryobi's "standard" battery. The recharge time for a P102 on a P117 is only 34 minutes, so the "30 minute" claim seems reasonable also.

What's the difference between the P117 and P118 chargers? What should I buy?

Obviously the P117 is green and has a larger foot print than the black/gray P118 and they're the same height. Both chargers have the IntelliPort feature and have a built-in circuit which delays the charging of a pack that's too hot or too cold until it's reached an acceptable temperature, but the P117 is the only Ryobi One+ charger with a "Temp Delay" LED to indicate the reason for the delay.

However, the P117 charges batteries faster than the P118, and as such it draw more power (85W for the P117 vs. 50W for the P118). As mentioned above, the P117 charges batteries at a rate of about 2.1A, whereas the P118 charges batteries at a rate of about 1.4A. The slower rate is probably better for battery health, and if you're a homeowner who will use the tools occasionally then the P118 is probably the better choice. But if you're a contractor or heavy user who is rapidly depleting then switching batteries to the charger again and again while working then the P117 is probably the better choice.

I don't measure 18 volts across my P108 battery. What's up with that?

Ryobi's newest batteries, the P107 and P108, are being marketed as "Lithium Plus". I'm not sure what this hype means, but they've apparently changed the internal circuit board design. As a result, the voltage at the terminals remains low until a load is detected. When used with most tools, you'll never notice the difference. But if you use a P740/P741 radio you may find that the radio doesn't come on when you press the power button. The quick fix is to press the battery's power level meter first, which briefly "wakes up" the battery.

With all other Ryobi batteries, a voltmeter across the terminals will measure the voltage of the pack. This can give an indication of the battery's charge level, much like the P150 Fuel Gauge will do.

Main Page    18v Batteries    Battery Chargers    Cordless Tools    Battery Rebuilds, etc.
NEW!   The Ryobi P102 Battery


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Last revised 08-Dec-2014
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