20V 4.0 AH MaxLithium Battery

ITEM WA3578

More Views

Harness Even More Power


Our most powerful 20V battery--4.0 Ah delivers up to double the run time of the 2.0 Ah battery

Delivers increased runtime and powers your 20V cordless WORX tool through the entire job

Professional grade, gas-like power with none of the emissions

Efficient MaxLithium technology charges quickly and lasts longer

Compact and lightweight — helps reduce fatigue while you're working

Part of the 20V Power Share platform that lets you save money by sharing batteries among multiple 20V tools

Recommended for use with WA3742 20V charger or WA3868 20V quick charger

20V 4.0 AH MaxLithium Battery ITEM WA3578
$74.99

Availability: In stock

Ships for FREE
GET DETAILS
1 Year Warranty
30 Day Guarantee
OR
SPECS & MANUALS
Technical Specifications
  • Battery Type
    MaxLithium
  • Rated Voltage
    20V
  • Charging Time
    ≈ 5 Hours
  • Charger Model
    WA3847
Compatible Models
  • Model
  • Model
  • Model
  • Model
    WG166.1
  • Model
    WG166
  • Model
    WG165
  • Model
  • Model
  • Model
  • Model
    WG160.2
  • Model
    WG160.1
  • Model
    WG160
  • Model
    WG157
  • Model
    WG156
  • Model
    WG155.5
  • Model
    WG155
  • Model
  • Model
    WG153
  • Model
    WG152
  • Model
    WG151.5
  • Model
    WG151
  • Model
    WG150
WHAT'S INCLUDED
You're Getting
  • (1) - 20V MaxLithium Battery
FAQs

Frequently Asked Questions

  • Which tools are compatible with this battery (WA3578)?

    The Worx 20V 4.0Ah battery is compatible with all 20V Worx tools – both garden tools and power tools! PowerShare lets you share the battery and save money.



  • How much does this battery weigh?

    The 4.0Ah 20V battery (WA3578) weighs about 1.4lbs.



  • How long can you trim on each 4.0Ah 20 Volt Max Lithium battery charge?

    On the Worx GT 2.0 String Trimmer/Edger/Mini-Mower, each 4.0Ah 20 Volt Max Lithium Battery will provide enough working time per charge to trim up to the average 1/2 acre yard. It’s like having two batteries in one! Actual results may vary depending on the density of the grass or weeds you’re cutting, the amount of trimming versus edging, and the age of the battery pack.



  • How long does it take to charge the 4.0Ah 20 Volt Max battery?

    It takes about 10 hours to fully charge the battery with a standard charger (WA3742), or two hours with a quick charger (WA3868).



  • Is the battery larger than previous models?

    The Worx GT 2.0 features our highest capacity battery to date. This 20 Volt Max Lithium Battery has an amp hour rating of 4.0 vs our previous models (2.0 and 1.5 amp hour rating). The amp hour rating measures how much energy can be stored in the battery (energy capacity). The 20V Worx 4.0 Ah battery (WA3578) can hold twice the amount of energy as previous models (WA3525). This extra capacity provides up to double the run time.



  • Are the 20 Volt Max Lithium batteries interchangeable with the 32 Volt Max Lithium Battery?

    While Power Share allows you to share batteries between tools within the same voltage family, batteries should only be used with tools of a corresponding voltage. Use your 20V Max Lithium battery with any 20V Worx tool – even the power tools – but save your 32V battery for your 32V tools.


  • Are lithium batteries interchangeable with the Ni-Cad?

    Our lithium tools and Ni-Cd tools are separate platforms and are not interchangeable. Lithium batteries offer our customers maintenance-free technology without the hassle of managing the memory effect inherent in Ni-Cad batteries.


  • Which charger is compatible with the 4.0Ah 20V Worx MaxLithium battery (WA3578)?

    The Worx WA3742 20V charger and the Worx WA3868 20V quick charger are compatible, along with WA3835, WA3764, and WA3875. Charging times will vary by style of charger.



  • What’s the difference between this battery (WA3578) and the WA3525 20V battery?

    The difference between our Worx 20V batteries is their amp hour rating. The amp hour rating measures how much energy can be stored in the battery (energy capacity). The 20V Worx 4.0 Ah battery (WA3578) can hold twice the amount of energy as previous models (WA3525). This extra capacity provides double the run time.



  • Are there any precautions I should follow?

    Regardless of the tool or job at hand, we recommend that our customers follow standard safety precautions while using our tools, including wearing safety eyewear, gloves, appropriate shoes and clothing, and keeping hair tied back. Always refer to the owner’s manual for complete safety information before operating any tool.



  • What is the guarantee/warranty?

    If you decide the 4.0Ah 20V MaxLithium Worx battery isn’t the right for you, we offer a 30-day Money Back Guarantee from date of receipt (less shipping and handling). Please call our customer service center at 1-866-354-9679 (WORX) and we’ll be happy to assist. For more information, click here.


    Worx batteries are covered by a 1 Year Limited Consumer Warranty and are not eligible for warranty extension.


    View more information on our warranty here.



  • Where can I get replacement parts?

    Many replacement parts are available online under Accessories.



20V 4.0 AH MaxLithium Battery is rated 4.4 out of 5 by 25.
Rated 5 out of 5 by from Love it. So much better than the standard 2ah battery. Last so much longer and I find the extra weight (which is not a lot) actually balances my tools (trimmer & blower) better than 2ah battery.
Date published: 2018-06-19
Rated 5 out of 5 by from Battery power indicators Just received and used one time but now I can tell how much charge is on the battery. Much better WORX.
Date published: 2018-04-24
Rated 5 out of 5 by from Must have! All of their batteries should last this long. I have two of their work lights and the regular batteries don't last long enough to get the job done. If you have the WORX Work Light, this battery is a must have!
Date published: 2018-01-18
Rated 5 out of 5 by from Battery with power My husband bought this extra battery for Christmas to go along with the leaf blower. Wow this battery last a long time I just love it.
Date published: 2017-12-31
  • y_2018, m_7, d_20, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_24
  • loc_en_US, sid_WA3578, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_worx
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 22.43ms
  • REVIEWS, PRODUCT