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Model#: ORGN545937

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Oregon B500S PowerNow Standard 40V MAX 1.25 Ah Lithium-Ion Battery

  • Oregon B500S PowerNow Standard 40V MAX 1.25 Ah Lithium-Ion Battery
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.


The OREGON B500S 40V MAX 1.25 Ah Standard Battery pack is a Lithium-Ion battery combining high capacity cell technology for increased power with a simple, lightweight design. Its advanced design will deliver constant power without getting bogged down under load and has no memory effect. The B500S delivers consistent no-fade power, providing maximum performance up until complete discharge, and will last approximately 1000 charging cycles.
Disclaimer: Fully charged battery voltage measured without workload is 40Vs with the nominal voltage at 37Vs.
  • 40V MAX Lithium-Ion technology means longer run times, consistent no-fade power, and increased performance
  • High capacity cell technology increases power while maintaining a lightweight design
  • Delivers constant, no-fade power up until complete discharge
  • No memory effect means charge maintenance and full discharge is not necessary to retain consistent capacity throughout the life of the battery
  • PowerNow Standard 40V MAX 1.25 Ah Lithium-Ion Battery - 545937


Series: PowerNow
Weight: 1.7 lbs.
Battery Amp Hours: 1.25 Ah
Battery Style: Slide
Battery Type: Li-Ion
Recharge Time: 60 Min.
Voltage: 40V



3.8 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend?
Yes (2)
No (2)
Lightweight (3)
Yes, I would recommend this to a friend
PowerNow Standard 40V MAX 1.25 Ah Lithium-Ion Battery
I use the product around the yard.
Things that are great about it: lightweight and very good run time.
Things that aren't so great about it: haven't found one yet.
July 15, 2015
Yes, I would recommend this to a friend
could last longer
no issues with the battery in the chainsaw but runs out fast in the trimmer
July 8, 2015
No, I would not recommend this to a friend
Oregon offers 3 battery sizes for their outdoor power tools. The smallest (this 1.25amp) has a short runtime but it is a full pound lighter than the other two (the 2.4amp and 4.0amp). Unless you have physical weight limitations don't waste your money on this l.25amp battery. It powers my weedeater (the ST275) just barely long enough to mow my small lawn. It charges fast though...less than an hour on the standard charger. Buy the 4amp model. It costs more but will be cheaper in the long run, and you won't find yourself frustrated, waiting for the battery to charge so you can finish your job. You would need two of these 1.25amp batteries on hand to get most any job done.
June 12, 2015
No, I would not recommend this to a friend
40V 1.25A battery
40V 1.25A battery is not worth the money. It uses up the charge too quickly. Have an extra battery available to wait for the battery to charge. Recommend upgrading to the 2.5A or better yet the 4A battery.
Plus is it is lighter weight.
July 14, 2015

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Oregon PowerNow Tool Warranty

All registered OREGON PowerNow 40V Max* Cordless Tools and Accessories are warranted for a period of two (2) years from original date of purchase, ninety (90) days if used for commercial purposes. This limited warranty applies to all OREGON PowerNow brand manufactured parts. Components not manufactured by Blount will be covered for the period and according to the provisions of each manufacturer’s warranty. During the warranty period, Blount will replace or, at its option, repair for the original purchaser only, free of charge, any product or part manufactured by Blount which is found upon examination by Blount to be defective in material and/or workmanship. The purchaser shall be responsible for all transportation charges and any cost of removing any part submitted for replacement under this warranty.