Set of 2 Makita 18V 5.0 Ah Lithium-Ion Batteries BL1850B-2

Contents of the Makita Battery Set

This complete set offers you two high-capacity batteries for optimal use and maximum productivity of your Makita 18V professional cordless tools.

2 Makita 18V LXT 5.0 Ah Lithium-Ion Batteries- Two high-capacity batteries designed to offer extended runtime and continuous rotation, each equipped with a 4-level LED indicator to monitor the state of charge, an intelligent electronic protection system against overload, overheating and over-discharge, and a memory chip optimizing charging according to specific usage conditions, with a robust construction resistant to demanding construction site conditions.

Advantages of the Makita 5.0 Ah 2-Battery Set

Continuous Rotation Without InterruptionThe 2-battery pack completely eliminates downtime on the job site by establishing optimal continuous rotation: while one 5.0 Ah battery powers your tool, the second recharges or remains available as an immediate spare. This configuration ensures maximum productivity even on the most demanding days, particularly critical for work at height, in remote areas, or for urgent projects requiring prolonged, uninterrupted use of high-power tools.

Superior Battery Life- Each 5.0 Ah battery offers approximately 67% more runtime compared to standard Makita 3.0 Ah batteries, allowing you to drill approximately 750 to 900 holes in hardwood with a drill/driver, versus 450 to 550 holes with a 3.0 Ah battery. This extended runtime significantly reduces interruptions for recharging and maximizes your daily productivity, which is particularly advantageous for demanding continuous applications.

Double Pack EconomyPurchasing this set of two batteries offers substantial savings compared to buying two individual batteries separately, while ensuring that both batteries come from the same production batch for consistent performance and lifespan. This configuration also optimizes your investment in high-capacity batteries, allowing you to fully equip your professional rotation with a single strategic purchase.

Universal LXT CompatibilityThese 5.0 Ah batteries work with all Makita tools in the 18V LXT platform, including over 300 different cordless tools. This exceptional universal compatibility allows you to invest in high-capacity batteries that will power all your current and future Makita 18V tools, maximizing your return on investment and significantly simplifying your professional equipment management.

Recommended Additional Accessories

Makita 18V Rapid Charger- Smart charger that recharges your 5.0 Ah batteries in 45 to 60 minutes, with LED indicators to monitor the charging status and a cooling system to extend the life of high-capacity batteries.

Makita 18V Double Charging Station- Charging stand that can accommodate both batteries simultaneously, optimizing the organization of your workshop and ensuring that both your batteries are charged and ready for use.

Makita 18V 3.0 Ah Battery- Compact, lightweight, supplementary battery perfect for less demanding tools, offering an optimal balance between weight and battery life for light everyday applications.

Makita 18V LXT Drill/Driver- Compact and powerful tool making full use of the 5.0 Ah capacity, offering high torque and extended runtime for all your drilling and screwdriving projects.

Makita 18V LXT Circular Saw- Powerful saw requiring the autonomy of 5.0 Ah batteries for repetitive cutting in structural timber, plywood and construction materials without interruption.

First Use

1. Initial Inspection of Both Batteries- Unpack your two Makita 18V LXT batteries and visually inspect them to ensure no damage has occurred during shipping. Check that the electrical contacts of each battery are clean and free of dust or debris that could affect the connection.
2. Initial Sequential Full LoadBefore first use, fully charge each battery individually for approximately 60 minutes with a compatible Makita 18V charger. This initial charge optimizes each battery's capacity and activates the memory chips. We recommend marking each battery (A and B) for easy future rotation.
3. Functionality Test- Insert each battery successively into a compatible 18V LXT tool until you hear a locking click. Press the LED indicator button on each battery to verify that all four lights illuminate, indicating a full charge.
4. Establishment of the Rotation System- Plan your battery rotation system: identify which battery is in active use, which is charging, and which is in reserve. This proactive approach maximizes your operational efficiency and ensures that a fully charged battery is always available to completely eliminate downtime.

Regular Maintenance

Monthly Checks

• Inspect the electrical contacts of both batteries and clean them gently with a dry cloth if necessary.
• Check the overall condition of each battery casing for cracks or damage
• Test the 4-level LED indicator on each battery to ensure they are working properly.
• Make sure the ventilation openings are not blocked by debris

Load Management

• Recharge the batteries before they are completely discharged to optimize their lifespan.
• Use only certified 18V compatible Makita chargers
• Alternate the use of the two batteries to balance the charge-discharge cycles.
• Do not charge both batteries simultaneously on an overloaded electrical circuit.

Performance Monitoring

• Note any significant decrease in the battery life of a specific battery
• Monitor the battery temperature during intensive use
• Regularly compare the performance of the two batteries to identify the one that needs priority replacement.
• Immediately replace any battery that shows signs of swelling, leakage, or abnormal behavior.

Cleaning and Maintenance

Clean the exterior of Makita batteries with a slightly damp cloth after use on dusty worksites, taking care to avoid getting water inside the electrical connectors or the charge indicator. Never use solvents, gasoline, or harsh chemicals that could damage the plastic casing.

For electrical contacts, use a pencil eraser or a dry cloth to gently remove any oxidation or buildup of metallic residue. Ensure the contacts are completely dry before inserting the batteries into a tool or charger to prevent short circuits.

Regularly inspect the ventilation openings of both batteries and use low-pressure compressed air to remove any accumulated dust. Never attempt to open the battery case, as this will void the warranty and pose a safety risk.

Precautions for Use

Never expose Makita 18V LXT batteries to extreme temperatures above 50°C or below -20°C, as this could damage the lithium-ion cells and significantly reduce their performance. In particular, avoid leaving the batteries in closed vehicles during the Quebec summer.

Avoid violent shocks, drops, and impacts that could damage the internal structure or electronic protection system. Although the casing is robust, always handle the batteries with care and store them in a secure location.

Never use a battery that shows signs of physical damage, cracks, swelling, or leakage. If you notice any of these problems with any battery, stop use immediately and contact Polar Industrial Equipment for advice on safe disposal and replacement.

Keep batteries away from flammable materials and never charge them near heat sources or in confined spaces without adequate ventilation. Never immerse batteries in water or any other liquid.

Storage Tips

Store your two Makita 18V LXT batteries in a cool, dry place, ideally at an ambient temperature between 15°C and 25°C, away from direct sunlight and excessive humidity which could cause corrosion on the electrical contacts.

For extended storage of more than one month, maintain each battery at a charge level of approximately 40 to 60% (around 50%) rather than fully charged or completely discharged. Storing them fully charged or completely discharged can reduce their overall lifespan and maximum capacity.

Use the original packaging or individual protective cases to prevent accidental contact between the electrical terminals and metallic objects that could cause a dangerous short circuit. High-capacity 5.0 Ah batteries can deliver a very high current in the event of a short circuit.

Check and recharge both batteries at least every 3 months, even if they are not in use. Alternate the charging order to balance the cycles between the two batteries and maintain their optimal electrochemical health.

Polar Industrial Equipment Offera 30-day money-back guaranteeon this product. If you are not completely satisfied, you can return the set of 2 batteries in its original packaging and in new condition for a refund.a full refund.

Makita Warranty Cover

Makita offers a 3-year limited warranty on these 18V LXT 5.0 Ah lithium-ion batteries, covering defects in workmanship and materials from the original purchase date. This warranty applies only to batteries used according to the manufacturer's instructions and under normal professional use conditions.

What Is Covered

• Manufacturing defects in lithium-ion cells and the electronic protection system
• Problems with abnormal performance or premature loss of capacity unrelated to wear
• Malfunctions of the overload, overheating and over-discharge protection system
• 4-level LED indicator failures
• Defects in the casing and electrical connectors

Warranty Exclusions

❌ Normal wear and tear resulting from regular and prolonged use over several years

❌ Damage caused by falls, impacts, crushing or improper handling on site

❌ Damage resulting from exposure to water, excessive humidity, or extreme temperatures

❌ Damage due to the use of incompatible or non-Makita certified chargers

❌ Damage caused by attempted repair, modification, or unauthorized opening of the case

❌ Batteries used for commercial rental purposes or in extreme industrial environments

Complaint Procedure

1. Contact Polar Industrial Equipment- For any problem occurring within the first 30 days, first contact our customer service who will assess the situation and guide you towards the appropriate solution, whether it is an immediate exchange of the complete set or a refund.
2. Gather the necessary documents- Prepare your original proof of purchase, the serial numbers of the two defective batteries (written on each case), and a detailed description of the problem encountered with photos if possible.
3. Problem Assessment- Our technical team will analyze your claim to determine if the problem is covered by the Polar Industrial Equipment warranty or if it falls under the Makita 3-year manufacturer's warranty.
4. Return or Replacement- Depending on the assessment, we will either proceed with an immediate exchange of the complete set from our local stock, or direct you to the Makita warranty service with all the necessary assistance to facilitate the process and minimize your downtime.
5. Monitoring and Resolution- We will ensure full follow-up of your claim until its satisfactory resolution, whether by replacement of the entire item, repair or refund according to the applicable terms, with regular communication on the progress.

Contact Polar Industrial Equipment:

• Telephone: 1-800-567-3206
• E-mail :info@equipementpolar.com
• Address: 3425 Wilfrid-Hamel Boulevard, Quebec
• Hours: Monday-Friday 8am-5pm

Contact Makita:For manufacturer warranty claims after 30 days, visitmakita.caor contact their customer service.