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expiredMrFrankLopez posted Oct 24, 2024 07:22 PM
expiredMrFrankLopez posted Oct 24, 2024 07:22 PM

Milwaukee M18 18-Volt Lithium-Ion Dual Bay Rapid Battery Charger

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$79

$149

46% off
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Deal Details
Various Retailers have Milwaukee M18 18-Volt Lithium-Ion Dual Bay Rapid Battery Charger (48-59-1802) on sale for $79. Shipping is free.

Thanks to community member MrFrankLopez for finding this deal.

Available from the following stores:
Product Details:
  • Compatible with all M18 batteries
  • Charges 2-packs simultaneously, over 3X faster than standard sequential chargers
  • REDLINK intelligence: optimizes charge rates based on the battery type and temperature to minimize charge duration and maximize battery lifespan
  • Internal fan maximizes charger performance

Editor's Notes

Written by oceanlake
  • Comes with a 5-year warranty.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by MrFrankLopez
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Various Retailers have Milwaukee M18 18-Volt Lithium-Ion Dual Bay Rapid Battery Charger (48-59-1802) on sale for $79. Shipping is free.

Thanks to community member MrFrankLopez for finding this deal.

Available from the following stores:
Product Details:
  • Compatible with all M18 batteries
  • Charges 2-packs simultaneously, over 3X faster than standard sequential chargers
  • REDLINK intelligence: optimizes charge rates based on the battery type and temperature to minimize charge duration and maximize battery lifespan
  • Internal fan maximizes charger performance

Editor's Notes

Written by oceanlake
  • Comes with a 5-year warranty.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by MrFrankLopez

Community Voting

Deal Score
+21
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Model: Milwaukee 48-59-1802 M18 Dual Bay Simultaneous Rapid Lithium-Ion Battery Charger - Red

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Sort: Lowest to Highest | Last Updated 5/20/2026, 08:44 PM
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Top Comments

smithmal
3326 Posts
1122 Reputation
Good video discussing the various MW chargers here: https://www.youtube.com/watch?v=hssbC8q-4Co

Take home message:
Default M18 charger provides 54W output
RAPID M18 charger provides double output (108W)

If we were to use the M18 12A battery as an example,
Default M18 charger takes 4 hours to charge to 100% if totally drained
RAPID M18 charger takes 2 hours to charge to 100% if totally drained

The other benefit of this charger is that you can charge two M18 batteries at the same time and they will charge simultaneously (vs. the default M18/M12 dual charger which will only charge one battery at a time).

There is also a MW SUPER charger that provies 248W output which is insane. It pulls 13.5A from your plug so you need to be sure you don't run too many things off the circuit providing power to the SUPER charger since it pulls so much amperage.

Here's a good review of MW chargers as well: https://toolguyd.com/do-fast-char...batteries/

Personally I wish these chargers had a "Storage" setting built-in in that they'd charge your batteries to 40 - 60% for long term storage. Then when you really needed them you could pop them onto a RAPID/SUPER charger to quickly charge and use. I've got a lot of MW batteries (both M12 and M18 versions) and generally store them after recharging them which is bad for these batteries over the long term.

22 Comments

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Oct 25, 2024 01:23 PM
141 Posts
Joined Jan 2016
yivekOct 25, 2024 01:23 PM
141 Posts
I got one of these on a different deal, I was trying to get the batteries and this was part of the deal (the free item). I didn't think I would use it because I have batteries and I have two chargers already.

I routinely use this and it is much faster than the ones you get with an M18 tool and much faster than I expected it to be.

I really appreciate it when I have to use my shop vac or leaf blower, the two things that eat up my batteries.
Oct 25, 2024 01:25 PM
29 Posts
Joined Dec 2014
L3g3nd420Oct 25, 2024 01:25 PM
29 Posts
Quote from yivek :
I got one of these on a different deal, I was trying to get the batteries and this was part of the deal (the free item). I didn't think I would use it because I have batteries and I have two chargers already.

I routinely use this and it is much faster than the ones you get with an M18 tool and much faster than I expected it to be.

I really appreciate it when I have to use my shop vac or leaf blower, the two things that eat up my batteries.
How much faster? Say for a 12ah forge battery on this charger vs a regular charger.
Oct 25, 2024 01:32 PM
141 Posts
Joined Jan 2016
yivekOct 25, 2024 01:32 PM
141 Posts
Quote from L3g3nd420 :
How much faster? Say for a 12ah forge battery on this charger vs a regular charger.
Milwaukee states 3x faster. I don't have Forge batteries but 5.0 XC and 6.0 XC and what would take about an hour or hours seems like it's done in about 30 minutes.

I would plug my old ones in and walk away and come back the next day or later in the day.

With this rapid charger I will come back what seems to be minutes and it's green and ready to go.
Oct 25, 2024 02:15 PM
480 Posts
Joined Aug 2015
NiceSlickBlackOct 25, 2024 02:15 PM
480 Posts
Quote from yivek :
Milwaukee states 3x faster. I don't have Forge batteries but 5.0 XC and 6.0 XC and what would take about an hour or hours seems like it's done in about 30 minutes.

I would plug my old ones in and walk away and come back the next day or later in the day.

With this rapid charger I will come back what seems to be minutes and it's green and ready to go.
Isn't faster charging worse for battery life?
2
Oct 25, 2024 02:27 PM
83 Posts
Joined Nov 2022
Rh1noOct 25, 2024 02:27 PM
83 Posts

Our community has rated this post as helpful. If you agree, why not thank Rh1no

The standard charger has a 3 amp charge rate, rapid charger is 6 amp, original super charger is 13.5 amp and new dual port super charger is 18 amp
2
Oct 25, 2024 03:06 PM
13 Posts
Joined Apr 2023
BeigeField913Oct 25, 2024 03:06 PM
13 Posts
purchased! awesome.
Oct 25, 2024 03:07 PM
3,326 Posts
Joined Aug 2004
smithmalOct 25, 2024 03:07 PM
3,326 Posts

Our community has rated this post as helpful. If you agree, why not thank smithmal

Good video discussing the various MW chargers here: https://www.youtube.com/watch?v=hssbC8q-4Co

Take home message:
Default M18 charger provides 54W output
RAPID M18 charger provides double output (108W)

If we were to use the M18 12A battery as an example,
Default M18 charger takes 4 hours to charge to 100% if totally drained
RAPID M18 charger takes 2 hours to charge to 100% if totally drained

The other benefit of this charger is that you can charge two M18 batteries at the same time and they will charge simultaneously (vs. the default M18/M12 dual charger which will only charge one battery at a time).

There is also a MW SUPER charger that provies 248W output which is insane. It pulls 13.5A from your plug so you need to be sure you don't run too many things off the circuit providing power to the SUPER charger since it pulls so much amperage.

Here's a good review of MW chargers as well: https://toolguyd.com/do-fast-char...batteries/

Personally I wish these chargers had a "Storage" setting built-in in that they'd charge your batteries to 40 - 60% for long term storage. Then when you really needed them you could pop them onto a RAPID/SUPER charger to quickly charge and use. I've got a lot of MW batteries (both M12 and M18 versions) and generally store them after recharging them which is bad for these batteries over the long term.
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Oct 25, 2024 03:19 PM
3,326 Posts
Joined Aug 2004
smithmalOct 25, 2024 03:19 PM
3,326 Posts
Good video discussing the various MW chargers here: https://www.youtube.com/watch?v=hssbC8q-4Co

Take home message:
Default M18 charger provides 54W output
RAPID M18 charger provides double output (108W)

If we were to use the M18 12A battery as an example,
Default M18 charger takes 4 hours to charge to 100% if totally drained
RAPID M18 charger takes 2 hours to charge to 100% if totally drained

The other benefit of this charger is that you can charge two M18 batteries at the same time and they will charge simultaneously (vs. the default M18/M12 dual charger which will only charge one battery at a time).

There is also a MW SUPER charger that provies 248W output which is insane. It pulls 13.5A from your plug so you need to be sure you don't run too many things off the circuit providing power to the SUPER charger since it pulls so much amperage.

Here's a good review of MW chargers as well: https://toolguyd.com/do-fast-char...batteries/

Personally I wish these chargers had a "Storage" setting built-in in that they'd charge your batteries to 40 - 60% for long term storage. Then when you really needed them you could pop them onto a RAPID/SUPER charger to quickly charge and use. I've got a lot of MW batteries (both M12 and M18 versions) and generally store them after recharging them which is bad for these batteries over the long term.
Oct 25, 2024 03:25 PM
381 Posts
Joined Sep 2013
Charlesb81Oct 25, 2024 03:25 PM
381 Posts
Quote from smithmal :
Good video discussing the various MW chargers here: https://www.youtube.com/watch?v=hssbC8q-4Co

Take home message:
Default M18 charger provides 54W output
RAPID M18 charger provides double output (108W)

If we were to use the M18 12A battery as an example,
Default M18 charger takes 4 hours to charge to 100% if totally drained
RAPID M18 charger takes 2 hours to charge to 100% if totally drained

The other benefit of this charger is that you can charge two M18 batteries at the same time and they will charge simultaneously (vs. the default M18/M12 dual charger which will only charge one battery at a time).

There is also a MW SUPER charger that provies 248W output which is insane. It pulls 13.5A from your plug so you need to be sure you don't run too many things off the circuit providing power to the SUPER charger since it pulls so much amperage.

Here's a good review of MW chargers as well: https://toolguyd.com/do-fast-char...batteries/

Personally I wish these chargers had a "Storage" setting built-in in that they'd charge your batteries to 40 - 60% for long term storage. Then when you really needed them you could pop them onto a RAPID/SUPER charger to quickly charge and use. I've got a lot of MW batteries (both M12 and M18 versions) and generally store them after recharging them which is bad for these batteries over the long term.
Why is storing them after recharging bad over the long term? Should you leave them on the charger?
Oct 25, 2024 05:34 PM
28 Posts
Joined Jul 2021
jiggermsOct 25, 2024 05:34 PM
28 Posts
Quote from NiceSlickBlack :
Isn't faster charging worse for battery life?
Yes, it can be. Not sure why you got down voted. The battery life can be affected since fast charging wears down the elements faster if it's not managed properly. The device needs to have a temp sensor and other logic to ensure it's not pushing the battery too hard. So basically we have to assume the manufacturer is doing it the best way possible.
1
Oct 25, 2024 06:26 PM
248 Posts
Joined Jul 2009
chippy111Oct 25, 2024 06:26 PM
248 Posts
Quote from L3g3nd420 :
How much faster? Say for a 12ah forge battery on this charger vs a regular charger.
https://www.milwaukeetool.com/-/m...-chart.pdf

According to this: A rapid charger will charge the 12 ah battery in 130 minutes vs 241 minutes on a regular.
Oct 25, 2024 07:08 PM
214 Posts
Joined Apr 2010
NereusOct 25, 2024 07:08 PM
214 Posts
Quote from NiceSlickBlack :
Isn't faster charging worse for battery life?
Excessive heat is the root problem for battery chemistry

'faster' charging maycreate excessive heat, it's a little complicated and case-by-case
Oct 25, 2024 09:23 PM
2,305 Posts
Joined Feb 2008
iIIuminatiOct 25, 2024 09:23 PM
2,305 Posts
Quote from NiceSlickBlack :
Isn't faster charging worse for battery life?
Yes it is. But it come down to time vs money. Do you want to wait for battery to finish charging to continue your work or you want to complete it faster at a cost of replacement battery in 5 years? Also buying more battery up front and use slow charger or having few with fast charger.

I would take the fast route since working on a job earn much more money to replace those batteries down the line.
Oct 25, 2024 09:27 PM
11 Posts
Joined Dec 2023
AquaPen9334Oct 25, 2024 09:27 PM
11 Posts
I have this charger and it's very good.

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Oct 25, 2024 10:37 PM
7,411 Posts
Joined Dec 2007
chevvyOct 25, 2024 10:37 PM
7,411 Posts
Fun fact: the standard Milwaukee M18 chargers are also rapid chargers. There's a switch under the housing to alternate between the two.

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