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Deal.ai › Makita
Makita
Makita 18V LXT 5.0aH Battery (PROMO BL1850B)

Makita 18V LXT 5.0aH Battery (PROMO BL1850B)

Best price now

$91.00at AmazonChecked 9 h ago

46% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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Price facts

  • Lowest price today: $91.00 at Amazon (checked Nov 15, 2026).
  • Checked at 5 stores.

Our take on the Makita 18V LXT 5.0aH Battery (PROMO BL1850B)

The Makita BL1850B is a 5.0Ah lithium-ion pack for Makita's 18V LXT cordless platform. It sits in the middle of the LXT range: more runtime than a 3.0Ah compact pack, lighter and cheaper than the 6.0Ah packs, and it fits every LXT tool and charger. Owners value the long runtime and the four-stage charge indicator; the main complaints are weight in compact tools and the cost of genuine packs against third-party ones.

Best forOwners of Makita 18V LXT tools who need a spare packLonger jobs than a 3.0Ah pack coversSharing one battery across a mixed LXT kit
Pros
  • 5.0Ah gives strong runtime for drills, saws and grinders
  • Fits the whole 18V LXT platform and LXT chargers
  • Four-stage LED charge indicator on the pack
  • Holds charge well in storage and resists self-discharge
  • Star protection against overload, over-discharge and overheating
Cons
  • Heavier than 3.0Ah compact packs, which unbalances small tools
  • Genuine Makita packs cost more than third-party equivalents
  • Full charge on a standard charger takes roughly 45 minutes
  • Older or non-LXT chargers will not fit it

Makita 18V LXT 5.0aH Battery (PROMO BL1850B) prices at every store

  • Tool NutNew

    In stockReturn policy

    $169.00Checked Nov 7
    Visit Tool Nut
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $91.00Free shippingChecked 9 h ago
    Visit Amazon
  • eBayNew

    Availability unknownSold by beyond_theworld

    $125.49Checked 9 h ago
    Visit eBay
  • Grainger Industrial SupplyNew

    Availability unknown

    $361.14Checked 9 h ago
    Visit Grainger Industrial Supply
  • MSC Industrial SupplyNew

    Availability unknown

    $422.00Checked 9 h ago
    Visit MSC Industrial Supply

Store links may earn us a commission.

Makita 18V LXT 5.0aH Battery (PROMO BL1850B) price history

Lowest price we've seen: $91.00 on Nov 15 at Amazon. Tracked across 4 stores since Nov 15.

What reviewers say

Owners rate the BL1850B as a reliable workhorse pack with runtime that covers most jobs and a charge gauge they use constantly. Complaints center on weight in compact tools and the price gap against third-party packs.

What people mention
  • RuntimePraisedOwners say a 5.0Ah pack lasts through most drilling and cutting jobs without a swap.
  • WeightMixedIt adds noticeable weight, which some find tiring in compact drills and drivers.
  • Charge indicatorPraisedThe four-stage LED gauge is described as accurate and useful for planning a recharge.
  • DurabilityPraisedLong-term owners report the pack keeps capacity after years of use.
  • ValueCriticisedSome buyers feel genuine Makita packs are priced high next to third-party alternatives.
  • Charging timeMixedRecharge speed depends on the charger; basic chargers take around 45 minutes.

About the Makita 18V LXT 5.0aH Battery (PROMO BL1850B)

The Makita BL1850B is an 18V LXT battery pack with a 5.0Ah capacity. It powers compatible Makita 18V LXT cordless tools, and it can serve as a replacement for an existing BL1850B or as a spare.

It is designed for the Makita LXT platform and is intended for use within the Makita LXT battery and charger system. It is not for use with other tool platforms.

The 5.0Ah capacity gives more runtime than smaller compact packs. With a spare, one pack can charge while the other stays in the tool.

Model
BL1850B
Voltage
18V
Capacity
5.0Ah
Platform
Makita 18V LXT
Product type
Cordless tool battery
Compatibility
Makita 18V LXT cordless tools
Charging
Makita LXT battery and charger system

Questions and answers

Is the BL1850B worth it over a 3.0Ah pack?
Yes if you want longer runtime per charge. The 5.0Ah pack roughly doubles the run time of a 3.0Ah pack but weighs more, so compact tools feel heavier.
Does it fit all Makita 18V LXT tools?
Yes. It is a standard 18V LXT slide-on pack and works with LXT drills, saws, grinders, blowers and chargers. It does not fit Makita's 12V CXT or 40V XGT tools.
How long does it take to charge?
About 45 minutes on a standard LXT charger and faster on Makita's rapid chargers. Charge time depends on the charger model.
Can I leave it on the charger?
Makita's chargers stop charging when the pack is full, so leaving it connected is fine. For long storage, keep the pack in a cool, dry place and top it up occasionally.
Does it have a fuel gauge?
Yes. A four-stage LED indicator on the pack shows remaining charge at the press of a button.
What is in the box?
One 5.0Ah 18V LXT battery pack. Chargers and tools are sold separately.
Where is the Makita 18V LXT 5.0aH Battery (PROMO BL1850B) cheapest?
At Amazon, for $91.00, 46% under what the other stores charge, as of our latest check.
Where can I buy the Makita 18V LXT 5.0aH Battery (PROMO BL1850B)?
5 stores we checked sell it, including Amazon, eBay, Grainger Industrial Supply, MSC Industrial Supply, Tool Nut.

Stores we've priced the Makita 18V LXT 5.0aH Battery (PROMO BL1850B) at

  • Grainger Industrial Supply deals and prices
  • MSC Industrial Supply deals and prices

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