Why won't my cordless tool battery hold a charge?

A cordless tool battery stops holding a charge because of a deeply discharged pack the BMS refuses to charge, dirty terminals, a faulty charger, or worn-out lithium cells. Test the charger with a known-good pack first and clean the contacts.

What battery does a Milwaukee M18 impact driver use?

A Milwaukee M18 impact driver uses the 48-11-xxxx lithium-ion battery line; this page stocks the 8.0Ah extended-capacity 2-pack replacing 48-11-1860, 48-11-1850 and 48-11-1840 at $89.99.

Cordless Tool Batteries for 14 Brands, 18V to 56V

Replacement cordless tool batteries and 2-packs from $49.99 for DeWalt 20V MAX, Milwaukee M18, Makita 18V LXT, Bosch, Ryobi ONE+ and 40V, Craftsman V20, Flex 24V, Kobalt, Greenworks and EGO. Lithium-ion packs with grade A cells, checked before dispatch, covered by a 1-year warranty.

Shop all cordless tool batteries

17battery packs listed

14tool brands

18-56Vvoltage platforms

1 yrreplacement warranty

Milwaukee M18 18V 8.0Ah lithium-ion replacement battery 2-pack

Grade A lithium cells1-year warranty60-day returns

How Do You Pick the Right Cordless Tool Battery?

A cordless tool battery has to match its platform, and voltage alone will not get you there. Three checks cover every brand on this page.

Match the platform, not the number

Every major brand locks its cordless power tools to a proprietary battery mount and electronics: DeWalt 20V MAX, Milwaukee M18, Makita 18V LXT, Ryobi ONE+. A battery only crosses between tools inside the same platform. One footnote: a 20V MAX label describes the same 18V-class system as an 18V label; the higher number is the off-load peak.

Part numbers like DCB206, 48-11-1860 and BL1850B identify the exact pack.

Read amp-hours as runtime

Ah is capacity, not power. A 5.0Ah pack runs roughly twice as long as a 2.5Ah on the same drill or impact driver, and a bigger pack can feed high-draw tools like circular saws better. The tool's voltage and motor set the power; the Ah only sets how long it lasts. The trade-offs are weight and charge time.

Going up in Ah is safe on the same platform; going down just shortens runtime.

Grade A cells and the BMS decide the rest

A lithium-ion pack is cells plus a battery management system that balances charge and cuts off faults. Packs built on grade A cells with a working BMS hold their rated capacity for 300 to 500 cycles. The cheapest tier skips both, which is why it dies in a season. Several packs here add a fuel gauge so you can read the charge level on the tool.

Every pack on this page carries the same 1-year warranty.

Cordless Tool Batteries by Voltage Platform

Pick your platform. Each panel lists every brand, part number, capacity and price we stock.

18V drills, drivers and saws

The largest platform class: Milwaukee M18, Makita LXT, Bosch, Ridgid, Ryobi ONE+ and Black and Decker.

Milwaukee M18 8.0Ah 2-pack
Replaces 48-11-1860, 48-11-1850, 48-11-1840. Extended capacity, works with all M18 tools and chargers.

$89.99 Buy

Bosch 18V 2-pack
Replaces BAT609, BAT610G, BAT618 for GSR18V-LI drills and drivers.

$89.99 Buy

Ridgid 18V 8.0Ah 2-pack
Replaces R840085, R840087.

$69.99 Buy

Makita BL1850B 6.0Ah
Replaces BL1850B, BL1840B, BL1830B for 18V LXT tools.

$59.99 Buy

Ryobi ONE+ PBP2007 6.0Ah 2-pack
Genuine OEM high-performance pack for the whole ONE+ system.

$189.99 Buy

Black and Decker HPB18 2-pack
Replaces HPB18, HPB18-OPE, 244760-00 for 18V drills and outdoor tools.

$49.99 Buy

Milwaukee M18 5.0Ah 2-pack + tire inflator
48-11-1852 batteries with the 2848-20 M18 bare-tool inflator.

$389.99 Buy

20V MAX systems

DeWalt 20V MAX, Craftsman V20, WORX PowerShare and Bauer.

DeWalt MAX XR
Replaces DCB206-2, DCB205-2 lithium-ion packs for 20V MAX drills, drivers and saws.

$59.99 Buy

Craftsman V20 2-pack
Replaces CMCB204, CMCB202, CMCB206.

$69.99 Buy

WORX PowerShare 20V
Replaces WA3525, WA3012, WA3520, WA3575, WG155. 6000 and 8000mAh options.

$69.99 Buy

Bauer 20V
Lithium-ion replacement for Bauer 20V cordless power tools.

$59.99 Buy

24V pro platforms

Flex 24V and Kobalt 24V Max.

Flex 24V 8.0Ah 2-pack
8000mAh lithium-ion replacement packs for Flex 24 Volt tools.

$169.99 Buy

Flex 24V 6.0Ah 2-pack
Replaces FX0111, FX0321. 144Wh Li-ion.

$149.99 Buy

Kobalt 24V Max 6.0Ah 2-pack
Replaces KB624-03, KB124-03.

$129.99 Buy

40V and 56V outdoor power equipment

Leaf blowers, string trimmers and mowers: Greenworks 40V, Ryobi 40V and EGO 56V.

Greenworks G-MAX 40V 6.0Ah 2-pack
Replaces 29472, 29462, 29252 for G-MAX 40V lawn equipment.

$129.99 Buy

Ryobi 40V 6.0Ah 2-pack
Replaces OP4050, OP40602, OP40261, OP4060.

$129.99 Buy

EGO BA2800T 2-pack
Lithium-ion replacement with fuel gauge for EGO 56V cordless tools.

$119.99 Buy

All 17 Cordless Tool Batteries in One Table

Platform, brand, replaced part numbers, capacity and price. The full catalog at a glance.

Platform	Brand	Replaces	Capacity	Type	Price	Order
18V	Milwaukee M18	48-11-1860 / 1850 / 1840	8.0Ah	2-pack	$89.99	Buy
18V	Bosch	BAT609 / BAT610G / BAT618	2-pack	2-pack	$89.99	Buy
18V	Ridgid	R840085 / R840087	8.0Ah	2-pack	$69.99	Buy
18V	Makita LXT	BL1850B / BL1840B / BL1830B	6.0Ah	Single	$59.99	Buy
18V	Ryobi ONE+	PBP2007	6.0Ah	Genuine OEM 2-pack	$189.99	Buy
18V	Black and Decker	HPB18 / HPB18-OPE / 244760-00	2-pack	2-pack	$49.99	Buy
18V kit	Milwaukee M18	48-11-1852 + 2848-20 inflator	5.0Ah	2-pack + tool	$389.99	Buy
20V MAX	DeWalt	DCB206-2 / DCB205-2	MAX XR	Replacement	$59.99	Buy
V20	Craftsman	CMCB204 / CMCB202 / CMCB206	2-pack	2-pack	$69.99	Buy
20V	WORX PowerShare	WA3525 / WA3012 / WA3520 / WA3575	6.0-8.0Ah	Replacement	$69.99	Buy
20V	Bauer	20V line	Lithium-ion	Replacement	$59.99	Buy
24V	Flex	24V line	8.0Ah	2-pack	$169.99	Buy
24V	Flex	FX0111 / FX0321	6.0Ah, 144Wh	2-pack	$149.99	Buy
24V Max	Kobalt	KB624-03 / KB124-03	6.0Ah	2-pack	$129.99	Buy
40V	Greenworks G-MAX	29472 / 29462 / 29252	6.0Ah	2-pack	$129.99	Buy
40V	Ryobi	OP4050 / OP40602 / OP40261 / OP4060	6.0Ah	2-pack	$129.99	Buy
56V	EGO	BA2800T	5.0Ah class	2-pack, fuel gauge	$119.99	Buy

Prices checked against each product page in September 2026. See product pages for full cell and charger details.

What Do You Power?

Three workload classes, three battery groups.

Drills and drivers

18V and 20V platforms

Milwaukee M18, Makita LXT, Bosch, Ridgid, Ryobi ONE+ and Black and Decker 18V packs, from $49.99
DeWalt 20V MAX XR, Craftsman V20, WORX and Bauer 20V packs, from $59.99
Match the platform mount; Ah sets runtime per charge

Pro 24V platforms

High-draw tools

Flex 24V in 6.0Ah and 8.0Ah 2-packs
Kobalt 24V Max 6.0Ah 2-pack
Bigger Ah feeds circular saws and grinders under load

Outdoor power equipment

Leaf blowers, trimmers, mowers

Greenworks G-MAX 40V and Ryobi 40V 6.0Ah 2-packs
EGO 56V BA2800T 2-pack with fuel gauge
Keep a second pack charged to swap mid-job

Why Buy Your Cordless Tool Batteries Here

1 yr

Replacement warranty

All batteries and adapters are covered for 1 year against manufacturing defects. A defective pack gets a free replacement.

Days to return

Unused packs in original packaging can come back within 60 days. Defective or incorrect items ship back on us.

100%

Checked before dispatch

Every pack runs a function and capacity check before it ships, the same bench procedure we use across the store.

24 h

Support response

Email support@laptopbatteriesadapters.com or WhatsApp +86 185 7067 9070. Requests are reviewed within 24 hours.

Grade A Lithium Cells, Checked Before Dispatch

What separates a lasting pack from a season pack

The cells and the battery management system. Grade A lithium-ion cells hold rated capacity for 300 to 500 charge cycles, and the BMS balances every charge and shuts down faults before they become failures. The cheapest tier skips both. Several packs here add a fuel gauge, like the EGO BA2800T and the Milwaukee extended-capacity M18.

What we check before dispatch

Every pack runs a charge-discharge cycle and a capacity measurement on the bench before shipment, the same procedure we use on laptop batteries. Compatibility is matched against the replaced part numbers, DCB206 against 20V MAX, 48-11-1860 against M18, so wrong-fit packs get caught here, not in your drill.

Battery Finder and Runtime Calculator

Find your pack by brand, then check what a higher Ah rating buys you.

Not sure which pack fits your tool?

Send us the part number on the old battery, or the tool model. We confirm the platform and the fit before you pay anything.

Ask us, it is free Browse the collection

Cordless Tool Battery FAQ

Yes, you can safely use a higher amp-hour battery in an 18V or 20V cordless drill as long as the voltage and platform match. Ah is runtime, not power: a 5.0Ah lithium-ion pack runs roughly twice as long as a 2.5Ah on the same drill or impact driver. The trade-offs are weight, cost and charge time, never safety.

No, power tool batteries are not interchangeable between brands, because DeWalt, Milwaukee, Makita, Bosch and Ryobi each lock their cordless tools to a proprietary battery mount and electronics. A pack crosses only inside its own platform, like Ryobi ONE+ across the whole ONE+ 18V range. Adapters exist but add bulk and can void warranties.

Ah on a tool battery means amp-hours, the measure of how much charge a lithium-ion pack holds per full charge. A 6.0Ah battery runs about three times as long as a 2.0Ah on the same drill or leaf blower. Ah does not raise a tool's power output; voltage and the motor set that.

A cordless tool battery stops holding a charge because of a deeply discharged pack the BMS refuses to charge, dirty or corroded terminals, a faulty charger, or worn-out lithium cells. Test the charger with a known-good pack first and clean the contacts. A pack stored fully dead for months may be locked out for good, and old cells have no fix but replacement.

Lithium-ion tool batteries last 300 to 500 charge cycles, about 2 to 3 years of regular cordless use. Heat, deep discharges and months of storage fully drained all shorten that. Packs kept around half charge in a cool dry place last the longest.

Yes, leaving power tool batteries on the charger for long periods speeds up degradation, even though modern lithium-ion chargers shut off when full. Pull the pack when the light says done and store it around half charge in a cool, dry place. A pack stored fully drained dies just as fast as one left on the charger.

A DeWalt 20V MAX drill uses the DCB-series lithium-ion battery, and this page stocks the MAX XR replacement for DCB206-2 and DCB205-2 at $59.99. One footnote: 20V MAX describes the same 18V-class system as other brands' 18V labels; the higher number is the off-load peak voltage. View the DeWalt pack.

A Milwaukee M18 impact driver uses the 48-11-xxxx lithium-ion battery line, and this page stocks the 8.0Ah extended-capacity 2-pack that replaces 48-11-1860, 48-11-1850 and 48-11-1840 at $89.99, plus a 5.0Ah 2-pack bundled with the 2848-20 tire inflator. View the M18 2-pack.

Good aftermarket cordless tool batteries match the platform mount, use grade A lithium-ion cells and carry a working BMS, and cost far less than brand-name packs. The bad tier skips all three and dies within a season. Every pack on this page is capacity-checked before dispatch and carries a 1-year warranty, including the genuine OEM Ryobi ONE+ PBP2007.

A 40V leaf blower drains a 6.0Ah lithium-ion battery in roughly 20 to 40 minutes of continuous running, which is why outdoor power equipment ships as 2-packs. A second pack beats waiting on a charge mid-job. The Greenworks G-MAX, Ryobi 40V and EGO 56V 2-packs on this page all follow that logic.

Cordless Tool Batteries for 14 Brands, 18V to 56V