I see you're curious about the battery life on the BLACK+DECKER LST136 trimmer. Let's dive into that.
This trimmer uses a 40V MAX* lithium-ion battery. From what we've gathered, the runtime really depends on how you're using it, especially with the PowerCommand dial that lets you adjust the power. If you're cranking it up to tackle tougher spots, you'll probably see the battery last around 25 to 30 minutes. For lighter trimming, it might stretch closer to 45 minutes to an hour.
The cool thing is the recharge time isn't too bad—it usually takes about 1 to 2 hours to get back to full charge, which is nice for keeping things moving along.
In terms of how long it lasts during use, just remember it varies with what you're cutting and the power setting. If you're working with a larger area, you might want to think about having an extra battery handy if you want to get everything done in one go.
And if you're having any troubles with the battery or other parts, like the guard, BLACK+DECKER's customer support is there to help out. It's always good to reach out if things aren't working quite as expected.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from 18 retailers in ShopSavvy's price data, most recently seen Jun 24, 2026.
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
| $129.00 | Jun 24, 2026 may have changed | ||
| $129.00 | Oct 22, 2024 may have changed | ||
| $137.08 | Oct 22, 2024 may have changed | ||
| $146.90 | Oct 22, 2024 may have changed | ||
| $149.00 | Oct 22, 2024 may have changed |
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