Product Description:
This TMR 18650 18.5V 4000mAh 1C Li-ion Battery Pack is a high-performance, pre-assembled power solution designed for DIY enthusiasts and professional retrofitting. Engineered in a 2 Parallel × 5 Series (2P5S) layout, it delivers a stable 18.5V output with a massive 4000mAh capacity, making it perfect for power-hungry 18V-class devices.
Constructed using genuine TMR 18650-2000mAh cells, this battery pack comes with nickel tabs already spot-welded in place, allowing for quick and hassle-free integration into your projects. Built with a multi-layer leak-proof design and a fully inspected secondary explosion-proof structure, it ensures maximum safety and durability. With an impressive 1500+ cycle life, this pack offers exceptional long-term value and reliability.
Key Features:
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Custom 2P5S Layout (18.5V 4000mAh): Features a 2 Parallel × 5 Series configuration, delivering a powerful 18.5V output and a high 4000mAh capacity for extended runtimes.
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Pre-Welded Nickel Tabs: Comes with nickel strips already spot-welded for easy connection. No need for complicated soldering or battery spot welding.
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Premium TMR 18650 Cells: High-quality, true-to-spec 2000mAh 3.7V cells from TMR with a stable 1C discharge rate.
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Multi-Layer Leak-Proof & Explosion-Proof Design: Features a fully inspected secondary explosion-proof design, bottom sealing cap, and safety heat-dissipation vents to rapidly release gas in extreme cases, preventing swelling or explosion.
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1500+ Long Cycle Life: Supports over 1500 recharge cycles. Economical, durable, and environmentally friendly.
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Mercury-Free & Eco-Friendly: Safe, non-toxic, and environmentally friendly battery construction.
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Stable Discharge Performance: Delivers consistent and stable voltage output, ensuring reliable power for your devices throughout the discharge cycle.
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Professional Quality Assurance: Manufactured by TMR, a trusted brand with rigorous quality control for long-lasting, dependable performance.
Product Parameters:
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Brand: TMR
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Configuration: 2 Parallel × 5 Series (2P5S)
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Total Voltage: 18.5V
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Total Capacity: 4000mAh
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Single Cell Model: 18650 Li-ion Battery
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Single Cell Capacity: 2000mAh
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Nominal Voltage: 3.7V
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Discharge Rate: 1C
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Internal Resistance: ≤50mΩ
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Cycle Life: ≥1500 times
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Weight (Total): Approx. 430g (based on 10 cells)
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Charge Temperature: 0°C to 45°C
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Discharge Temperature: -10°C to 60°C
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Charging Cut-off Voltage: 4.2V (per cell) / 21V (total pack)
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Tab Layout: Pre-welded nickel tabs for easy connection
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Safety Design: Multi-layer leak-proof, secondary explosion-proof, bottom sealing cap, safety heat-dissipation vents
Applications:
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High-Performance LED Flashlights: Reliable, high-capacity power for high-lumen tactical flashlights and outdoor searchlights.
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18V Cordless Power Tools: Ideal for retrofitting and powering cordless electric screwdrivers, drills, and other 18V-class DIY tools.
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RC Hobbies & Drones: Powers remote-controlled aircraft, heavy-lift drones, and large-scale RC car models.
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Outdoor Portable Power Stations: A core power module for building custom portable energy storage systems and outdoor power banks.
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Smart Home & Security Systems: Reliable backup power for high-power wireless sensors, security cameras, and smart doorbells.
Frequently Asked Questions (FAQ):
Q1: What does "2P5S" mean in this battery pack?
A1: "2P5S" means the pack is arranged in a 2 Parallel × 5 Series configuration. In simpler terms, it consists of 10 cells total: 5 sets of cells connected in series (to achieve 18.5V), with each series set having 2 cells connected in parallel (to achieve 4000mAh capacity).
Q2: Are the nickel tabs already welded to the batteries?
A2: Yes! The nickel tabs are pre-spot-welded for easy connection. There is no need for complicated soldering or spot welding equipment. You can connect them directly to your device's wiring.
Q3: What is the advantage of the multiple safety designs shown in the images?
A3: These battery packs feature a bottom sealing cap and safety heat-dissipation vents. Combined with a fully inspected secondary explosion-proof design, these features safely release internal gases in extreme conditions, effectively preventing battery swelling, leakage, or explosion.
Q4: How do I charge this 18.5V 4000mAh battery pack?
A4: You must use a charger specifically designed for 18.5V Lithium-ion battery packs. The charger must support a cut-off voltage of 21V. We recommend using a dedicated smart charger with over-charge protection for your specific 18.5V application.
Q5: Why should I choose this pre-welded pack over buying individual cells?
A5: Buying individual cells requires professional spot welding equipment and complex assembly skills, which is time-consuming and carries safety risks. This pre-welded pack eliminates the assembly work, ensuring correct battery alignment, proper connections, and immediate ready-to-use convenience.
