Rated 4.96 out of 5 based on 24 customer ratings
(24 customer reviews)

$13.99

ML4-6 – 6V 4.5AH Replacement Battery for YT-645 with F1 Terminal

SKU: ML4-691816 Category:
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$ 13.99
$ 19.99
$ 34.99
$ 49.99
$ 79.99
$ 109.99
$ 27.99
Delivering power when you need it, the Mighty Max ML4-6 6 Volt 4.5 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 ML4-6 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: 6 Volt
Amperage: 4.5 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions:
2.76 in x 1.89 in x 4.21 in
Weight: 1.83 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

15 Pack, 1 Pack, 2 Pack, 3 Pack, 4 Pack, 6 Pack, 10 Pack

Volts

6V

Amp Hour

4.5Ah

Chemistry

SLA / AGM

Quantity

1

Length

2.76

Width

1.89

Height

4.21

Weight

1.83 Lbs

Warranty

1 Year

24 reviews for ML4-6 – 6V 4.5AH Replacement Battery for YT-645 with F1 Terminal

  1. Rated 5 out of 5

    CT

    As described

  2. Rated 5 out of 5

    martin hillenbrand

    I replaced the internal battery inside a Coleman air pump. Works better than when it was new…

  3. Rated 5 out of 5

    Tim J.

    Fit perfect in my grandsons lil atv

  4. Rated 5 out of 5

    rich

    The item was as described and arrived on time

  5. Rated 5 out of 5

    Donald Wyne

    good.price

  6. Rated 5 out of 5

    Isabel Cardenas

    Best battery ever my son really enjoyed riding his Mercedes Benz again he was so happy I’m overall very happy with this battery

  7. Rated 5 out of 5

    Gary K. Smith

    Seemed to work well.

  8. Rated 5 out of 5

    Web Customer

    Product arrived quick and in working order. Price was right and the battery worked. What else could you ask for. Bring on the Fire Dept inspection 🙂

  9. Rated 5 out of 5

    Customer

    Product arrived quick and in working order. Price was right and the battery worked. What else could you ask for. Bring on the Fire Dept inspection 🙂

  10. Rated 5 out of 5

    Juan Moti

    Lantern

  11. Rated 5 out of 5

    Juan Moti

    Lantern

  12. Rated 5 out of 5

    Heather

    Works for my exit sign.

  13. Rated 5 out of 5

    Heather

    Works for my exit sign.

  14. Rated 5 out of 5

    Gregg M

    I ordered this for an old rechargeable lantern I’ve used for years. The size was exact and the price was right.

  15. Rated 5 out of 5

    A. Pearson

    Got this replacements battery for my emergency light. Works great. Good price.

  16. Rated 5 out of 5

    NessieJade

    This battery was a perfect replacement for a long expired battery in one of our emergency lights. Far cheaper and easier to replace the battery than to replace the whole unit. Arrived promptly in good condition. It works properly when we test the unit monthly.

  17. Rated 5 out of 5

    Barry B.

    Battery was exactly as described – once charged, it worked like a charm! Excellent price! Thank You!

  18. Rated 5 out of 5

    Greg Anderson

    perfect fit replacement for my spotlight.

  19. Rated 5 out of 5

    Carol Green

    Great product, perfect fit, fast shipping.

  20. Rated 5 out of 5

    2Joe

    Replaced battery in emergency lights several months ago. So far, so good.

  21. Rated 5 out of 5

    colt. s

    fit perfect. good price.

  22. Rated 5 out of 5

    Rod

    Works good and never had a problem with it since delivered

  23. Rated 5 out of 5

    jhw

    Just as described, easy to use, and works great! Packaged well, arrived timely. A nice, solid quality product.

  24. Rated 4 out of 5

    John Whiteker

    This unit directly replaced my faulty one. 4 stars simply because I cannot rate it’s longevity since I just installed it. But it did show up with a good charge and fixed my emergency light. So now the city fire marshall is happy once again. 🙂

Only logged in customers who have purchased this product may leave a review.

Excellent
Mighty Max Battery
Based on 3474 reviews
Arrived quickly. Even got a sticker with it.
Solid looking battery, came well packaged. Have used their battery before for my lawnmower and now looking forward to see how it lasts in my snowmobile.
I can't believe it less than 48hrs since I ordered from Walmart and it's in the machine. What more can I say except great price.
Thanks Larry
Item as described and perfect fit and arrived on time
Battery arrived in a good shape package strait to my door steps
Arrived just in time to power my generator here in the cold Maine winters. Excellent service!
Arrived quickly from WALMART.COM. Perfect size and proper placement in my generator. Installation was easy. Generator fired right up. Battery came fully charged.
New battery. Ready for cold weather!
So far these Might Max batteries are good but it’s only the first day and they were on charge for 12 hrs. I’ll have to come back and do an update at some point in time. Ordered them on Amazon and got them the next day. I was encouraged by Mighty Max to make this google review and post pictures to extend my warranty for 3 months but there is no way to post pictures 🤣🤣🤣 It’s been a few months and I was able to go back and edit, so here is a video I made, the rest of the photos I have deleted. Batteries are still going strong. Update 12-11-2025
They arrived within 2 days of ordering them packaging was really good I haven't put them in my MX350 yet I hit them with my multi meter fresh out of the box and got 12.4v on both batteries so that is good