20V Battery for Black and Decker Weed Eater
This Lasica replacement is advertised as a two-pack of 4.0Ah lithium-ion batteries for compatible BLACK+DECKER 20V MAX tools, including selected string trimmers. The pack slides into the tool and clicks into place, and swapping it needs no tools.
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Will This Battery Work in Your Weed Eater?
This battery is for BLACK+DECKER 20V MAX tools only. Run this quick check against your trimmer’s manual before you buy.
BLACK+DECKER says its batteries are interchangeable within the same voltage range. A 20V MAX pack therefore belongs in 20V MAX tools. Some replacement listings name the LCS1240 chainsaw, but BLACK+DECKER lists that tool as 40V MAX. Capacity details also differ across listings for this product, so check the pack details on the product page.
Replacement for Black and Decker 20V Battery Specifications
| Property | Detail |
|---|---|
| Brand | Lasica |
| Product type | Third-party replacement battery, not made by BLACK+DECKER |
| Listing reference | ASIN B074K4FN8X |
| Chemistry | Lithium-ion (as listed) |
| Rechargeable | Yes |
| Advertised voltage | 20V MAX |
| BLACK+DECKER platform voltage | 20V MAX = 20V maximum initial voltage with no workload; 18V nominal |
| Advertised capacity | 4.0Ah (4,000mAh) per battery |
| Pack quantity | 2 batteries |
| Format | Slide-in pack advertised to fit BLACK+DECKER 20V MAX release-latch mounts |
| Replacement numbers listed | LBXR20, LBXR20-OPE, LBXR20-OPE2, LBXR20B-2, LBXR2020-OPE, LB2X3020-OPE, LB2X4020, LBXR20BT |
| Original LBXR20 for reference | BLACK+DECKER 1.5Ah battery |
| Intended tools | Compatible BLACK+DECKER 20V MAX cordless tools, including selected string trimmers |
| Not for | BLACK+DECKER 40V MAX tools such as the LCS1240 chainsaw |
Figures are advertised ratings from product listings and BLACK+DECKER pages, not independent test results. Dimensions, weight, cell type, discharge current, protection circuits, certifications and warranty terms were not confirmed and are left out.
Weed Eater Battery Replacement Difficulty
Swapping a removable slide-in pack is easy and needs no tools. The part that takes real care is confirming the battery matches your trimmer. Tap a slice to highlight it.
- 15% Releasing the old pack
- 15% Sliding in the new pack
- 45% Checking compatibility
- 25% Confirming the click & fit
The difficulty score and effort split are an editorial estimate based on BLACK+DECKER’s release-and-slide battery procedure, not an official rating or a hands-on test of this battery.
How to Replace Your Weed Eater Battery
Tap each step to tick it off as you go. Steps follow the BLACK+DECKER LST220 manual. Check your own model’s manual if the release button sits elsewhere.
- 1Switch off and lockMake sure the lock-off button is engaged so the trigger cannot switch the tool on while you change the battery.
- 2Remove the old batteryPress the battery release button and pull the pack out of the tool. On the BLACK+DECKER LST220 trimmer, the button is at the back of the pack.
- 3Insert the new batteryPush the pack into the tool until it is fully seated and you hear a click.
- 4Check the fitConfirm you heard the click and the pack sits firmly before you use the trimmer.
Do not force the pack in. Take it out and check the battery numbers your tool manual lists. If the pack still will not seat, stop and do not modify the pack or the tool.
Other Tools on the 20V MAX Platform
These BLACK+DECKER tools use 20V MAX batteries. Replacement listings advertise the pack for this platform, but fit with each tool has not been tested. Confirm your tool’s manual first.
- LST220 trimmerManual lists LBXR20 and LB2X4020
- LST522 trimmer20V MAX 2-speed trimmer/edger
- LSTE525 trimmer20V MAX EASYFEED trimmer/edger
- LGC120 cultivator20V MAX garden cultivator
- LPHT120 pole hedge trimmer20V MAX POWERCONNECT
- LCS1020 chainsaw20V MAX 10-inch chainsaw
- LPP120 pole pruning saw20V MAX POWERCONNECT
Safety, Care & Disposal
BLACK+DECKER says not to charge a battery pack with a cracked or damaged case, and not to use one that has been dropped or crushed. Damaged packs should go to a service centre for recycling.
- Never open a battery pack for any reason.
- Follow your tool manual for charger and battery requirements.
- Do not use the trimmer in the rain, and never splash or immerse the pack.
- Return old lithium-ion packs to a recycling point or retailer collection.
20V Battery for Black and Decker Weed Eater: FAQ
Is this a genuine BLACK+DECKER battery?
No. It is listed under the Lasica brand and marketed as a replacement for BLACK+DECKER 20V MAX batteries. BLACK+DECKER does not make it.
Does a two-pack mean one 8Ah battery?
No. The pack contains two separate batteries, each advertised as 4.0Ah. One goes in the tool and the other is a spare.
Will it fit every BLACK+DECKER weed eater?
No. It is intended for compatible 20V MAX lithium-ion models. BLACK+DECKER says its batteries are interchangeable within the same voltage range, and it lists some tools, such as the LCS1240 chainsaw, as 40V MAX. Check your trimmer’s manual for the accepted battery numbers.
Why is a 20V battery also called 18V?
BLACK+DECKER uses 20V MAX for the maximum initial voltage, measured with no workload. The nominal voltage is 18V.
How long will it run a weed eater?
No tested runtime for this battery is available. BLACK+DECKER says its 3Ah to 4Ah packs give more runtime per charge than its lighter packs, but that is a general statement and not a measured result for this Lasica battery.
Can I charge it with my original BLACK+DECKER charger?
Check your tool manual first. The BLACK+DECKER LST220 manual says to charge only designated BLACK+DECKER batteries in BLACK+DECKER chargers. Listings that claim charger compatibility are not approval from BLACK+DECKER.
Is the battery waterproof?
No waterproof rating has been confirmed. The BLACK+DECKER LST220 manual says not to use the trimmer in the rain and not to splash or immerse the battery pack.
Does it come with a warranty?
A warranty period for this Lasica battery has not been confirmed. The 2-year limited warranty on BLACK+DECKER’s own LBXR20 page applies only to that original product. Check the written terms on the product page.
