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WEN 4 Ah Lithium Ion (li-ion) Battery

20 Reviews
  • Double the run time of your 40-Volt tool with an extra battery
  • Lithium ion cells provide fade-free performance for your tools
  • 4 amp hours worth of battery power

$84.98

Remember when you did not depend on cords and gasoline to run your tools? Power your life with a WEN 40-Volt Max Lithium-Ion 4 Ah Rechargeable Battery. Compatible with the WEN 40-Volt Quick Charger (model 40400), this battery is designed to fit the entire WEN 40-Volt line, including the WEN Leaf Blower and the WEN Chainsaw. Lithium-ion cells create a fade-free power supply that provides 4 amp hours worth of steady and consistent operation. An onboard battery meter informs users when their power supply is running low and in need of a charge. Replace your current battery or add an extra for double the work time, keeping 1-on the charger and 1 in the machine. Forget the hassles of extension cords and gasoline. Its time to simplify your life with a WEN 40-Volt Max Lithium-Ion 4 Ah Rechargeable Battery. Remember when your yard work was easier than ever before? Remember WEN.
  • Double the run time of your 40-Volt tool with an extra battery
  • Lithium ion cells provide fade-free performance for your tools
  • 4 amp hours worth of battery power
  • Onboard battery meter informs users the status of the current charge
Weight 3.1 lbs
Dimensions 2.8 × 7.2 × 3.9 in

Latest reviews

  1. baiowolph

    We purchased this WEN 4Ah battery as a back up for our chain saw, in preparation for felling a 22 year old cedar tree that was growing too close to the garage. The tree was right at the limit in size for what the 16″ WEN chain saw could handle and the last thing we wanted was for the first battery to run down before the tree was on the ground. Turns out these 40-volt 4Ah batteries have plenty of power for the job! This is the real deal and we did need this second battery to finish bucking the tree after felling it. It lasts 15 to 20 minutes of near constant sawing, but we don’t drain the battery below half. Pay attention to the charge level and these batteries should last a long time. I recommend.

  2. peanut mm

    The charger should be offered for sale separately like other brands.
    So you don’t have to by a tool and battery to get a charger.

  3. Bonze27

    Cant recharge until cool. Only lasted about 30 minutes. But did the job at hand.

  4. Ken b

    Bought for chain saw was very surprised at how long it held charge

  5. Foyhwh

    Was amazed at how long the battery works before recharging

  6. baiowolph

    We purchased this WEN 4Ah battery as a back up for our chain saw, in preparation for felling a 22 year old cedar tree that was growing too close to the garage. The tree was right at the limit in size for what the 16″ WEN chain saw could handle and the last thing we wanted was for the first battery to run down before the tree was on the ground. Turns out these 40-volt 4Ah batteries have plenty of power for the job! This is the real deal and we did need this second battery to finish bucking the tree after felling it. It lasts 15 to 20 minutes of near constant sawing, but we don’t drain the battery below half. Pay attention to the charge level and these batteries should last a long time. I recommend.

  7. peanut mm

    The charger should be offered for sale separately like other brands.
    So you don’t have to by a tool and battery to get a charger.

  8. Bonze27

    Cant recharge until cool. Only lasted about 30 minutes. But did the job at hand.

  9. Ken b

    Bought for chain saw was very surprised at how long it held charge

  10. Foyhwh

    Was amazed at how long the battery works before recharging

  11. baiowolph

    We purchased this WEN 4Ah battery as a back up for our chain saw, in preparation for felling a 22 year old cedar tree that was growing too close to the garage. The tree was right at the limit in size for what the 16″ WEN chain saw could handle and the last thing we wanted was for the first battery to run down before the tree was on the ground. Turns out these 40-volt 4Ah batteries have plenty of power for the job! This is the real deal and we did need this second battery to finish bucking the tree after felling it. It lasts 15 to 20 minutes of near constant sawing, but we don’t drain the battery below half. Pay attention to the charge level and these batteries should last a long time. I recommend.

  12. peanut mm

    The charger should be offered for sale separately like other brands.
    So you don’t have to by a tool and battery to get a charger.

  13. Bonze27

    Cant recharge until cool. Only lasted about 30 minutes. But did the job at hand.

  14. Ken b

    Bought for chain saw was very surprised at how long it held charge

  15. Foyhwh

    Was amazed at how long the battery works before recharging

  16. baiowolph

    We purchased this WEN 4Ah battery as a back up for our chain saw, in preparation for felling a 22 year old cedar tree that was growing too close to the garage. The tree was right at the limit in size for what the 16″ WEN chain saw could handle and the last thing we wanted was for the first battery to run down before the tree was on the ground. Turns out these 40-volt 4Ah batteries have plenty of power for the job! This is the real deal and we did need this second battery to finish bucking the tree after felling it. It lasts 15 to 20 minutes of near constant sawing, but we don’t drain the battery below half. Pay attention to the charge level and these batteries should last a long time. I recommend.

  17. peanut mm

    The charger should be offered for sale separately like other brands.
    So you don’t have to by a tool and battery to get a charger.

  18. Bonze27

    Cant recharge until cool. Only lasted about 30 minutes. But did the job at hand.

  19. Ken b

    Bought for chain saw was very surprised at how long it held charge

  20. Foyhwh

    Was amazed at how long the battery works before recharging

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