Rated 4.75 out of 5 based on 20 customer ratings
(20 customer reviews)

$21.99

12V 8Ah Black Decker CST1000 Type 4 String Trimmer Battery

SKU: ML8-12186111111 Category:
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$ 21.99
$ 39.99
$ 74.99
$ 109.99
$ 149.99
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Delivering power when you need it, the Mighty Max ML8-12 12 Volt 8 AH uses a state of the art, heavy-duty, calcium-alloy grid that provides exceptional performance and service life in both float and cyclic applications.
The ML8-12 is an Absorbent Glass Mat (AGM) technology with a valve regulated design, that can be used in enclosed and indoor environments without leaking or maintenance, providing a superior performance for thousands of models.
Mighty Max SLA batteries are utilized in a wide variety of applications including; Consumer Electronics, Electric Vehicles, Engine Starters, Golf Carts, Hunting, Lawn and Garden Tools, Medical Mobility, Motorcycles, Power sports, Portable Tools, Solar, Toys and Hobby, Access Control Devices, Emergency Lighting, Security and more.
Specifications:
Voltage: 12 Volt
Amperage: 8 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions:
5.94 in x 2.56 in x 4.02 in
Weight: 4.96 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack, 6 Pack, 8 Pack, 10 Pack

Volts

12V

Amp Hour

8Ah

Chemistry

SLA / AGM

Terminal

.187" – F1

Quantity

1

Length

5.94

Width

2.56

Height

4.02

Weight

4.96 Lbs

Warranty

1 Year

20 reviews for 12V 8Ah Black Decker CST1000 Type 4 String Trimmer Battery

  1. Rated 4 out of 5

    Stephen T.

    The connectors on this new battery were F1 connectors, not F2 connectors like the listing said. This meant that the battery terminals were smaller than the connectors of the weed trimmer. I just pushed them on and they were tight enough to not cause a problem so far. I did not change the end connectors to a smaller size. I was still able to install the battery and it has been working fine for the past week.

  2. Rated 5 out of 5

    Larry

    good replacement

  3. Rated 4 out of 5

    Dale Sparks

    Very poor installation directions.

  4. Rated 4 out of 5

    HunleyFriend

    It fit exactly and gave new life to my very old weed whacker. Can’t give it 5 stars until I see how long it will last.

  5. Rated 4 out of 5

    HunleyFriend

    It fit exactly and gave new life to my very old weed whacker. Can’t give it 5 stars until I see how long it will last.

  6. Rated 5 out of 5

    Magnum Hunter

    Battery was an exact drop-in replacement for the OEM battery. Works as expected. Received before due date.

  7. Rated 5 out of 5

    Magnum Hunter

    Battery was an exact drop-in replacement for the OEM battery. Works as expected. Received before due date.

  8. Rated 5 out of 5

    gdaddy

    Great product and a perfect fit. The battery holds its charge and lasts a long time; at least 1.5 hours during my last use. This battery saved me from having to throw out and replace my trimmer. Thanks guys!!!

  9. Rated 5 out of 5

    SC Porsche

    My weed whacker is like new again! This thing was 15 years old on original battery and finally died. Cheap fix. Thanks!

  10. Rated 5 out of 5

    Mr Bill

    Perfect fit and performance.

  11. Rated 5 out of 5

    Web Customer

    Just the item I needed

  12. Rated 5 out of 5

    Customer

    Just the item I needed

  13. Rated 5 out of 5

    John C

    It was a snap to install into my B&D weed whipper. Charged up and now it’s like new again!!

  14. Rated 5 out of 5

    OC Customer

    Perfect fit

  15. Rated 5 out of 5

    Joan

    Works great… My weed eater works great!!!

  16. Rated 5 out of 5

    Andrew Steadman

    Good replacement battery. My trimmer runs like new.

  17. Rated 5 out of 5

    Customer

    Very easy to replace and charged very quickly. Much cheaper than purchasing a whole new weed whacker.

  18. Rated 4 out of 5

    Hardware guy

    this battery revived on old B&D trimmer. It holds a charge for my needs. Recharges quickly.

  19. Rated 5 out of 5

    Adam Smith

    Excellent. Arrived with a charge. Used it and charged it again. Trimmer runs like new.

  20. Rated 5 out of 5

    Harry

    I received the battery about a week ago, and everything seems fine.The size is as stated and it fits my B & D CST1000 weed eater just fine. I don’t know what an F1 terminal is but it is a little smaller than a quarter inch terminal. My quarter inch connectors fit snugly enough though.At the time of this writing Mighty Max Battery has a no questions asked return policy. Since the price of the battery includes the shipping, if you do have to return it, you get all your money back. ( Less return shipping I suppose.) That makes Might Max Battery a good deal.

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Excellent
Mighty Max Battery
Based on 3513 reviews
Awesome pricing and shipping!!👍👍
I would recommend this battery to anyone looking for a great battery at a reasonable price. We had this exact same battery in our KIA we brought new at the end of 2018, & we are just now replacing it! We purchased it on December 18, & received it today the
20th of December
I would recommend this battery to anyone looking for a great battery at a reasonable price.We had this exact same battery in our KIA we brought new at the end of 2018, & we are just now replacing it! We purchased it on December 18, & received it today the 20th of December
Shipped fast and easy. Perfect fit. Thank you Mighty Max.
Nice replacement, same size, nicely packaged and fast delivery
Purchased two batteries ML9-12 SLA for a Cyberpower unit CP1500AVRLCD to replace old/exhausted OEM batts. The new ones were easy to replace and are a direct replacement and perfect fit of the OEM batts
product showed up in two days and they were fine condition.
I ordered a battery through Walmart online. My mother ordered it for me. It came in 3 days. It started right up. It made my 150 cc moped run so smooth.
Ordered via Amazon on 12/3/2025; arrived in 3 days.
Easy installation and charging as I am typing. Replacing in unit as shown.