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50 PCS 18650 Fish-Paper Insulator Rings – Pure Fiber
Regular price $2.99 USDRegular price$4.99 USDSale price $2.99 USDSale -
50 PCS 21700 Fish-Paper Insulator Rings – Pure Fiber
Regular price $2.99 USDRegular price$4.99 USDSale price $2.99 USDSale -
DIY 18650 Power Bank Kit – USB-C PD + QC3.0, Wireless Charging & LCD Display (No Cells)
Regular price $11.99 USDRegular price$16.99 USDSale price $11.99 USDSale -
2S 8.4V 20A BMS Board w/ Balance
Regular price $6.99 USDRegular price -
Pre-Cut Nickel Strips for DeWalt 20V MAX 5Ah Battery Pack
Regular price $10.99 USDRegular price -
Electrical Insulating Adhesive Paper 0.2mm – 200mm x 3m (7.9in x 9.9ft) Battery Pack Insulation Sheet for Lithium Cells & Circuit Boards – Green
Regular price $10.99 USDRegular price -
50× Pure Nickel Strips 0.2×10×100 mm – Pre-Cut for Battery Pack Spot Welding
Regular price $8.99 USDRegular price -
2 Rolls 10mm x 33m (108ft) Heat Resistant Polyimide Tape – High Temp Kapton Adhesive for Electronics, Soldering, Sublimation & Circuit Boards
Regular price $4.99 USDRegular price -
4x Samsung 25R 18650 2500mAh 20A Flat Top Li-ion Batteries + Case
Regular price $17.19 USDRegular price -
Molicel P50B 21700 3.6V 4850mAh 25A Li-ion Battery Cell – High Power & Long Cycle Life
Regular price From $8.99 USDRegular price$9.99 USDSale price From $8.99 USDSale -
DC 5.5×2.1mm Male & Female Pigtail Power Cable Connector Wire 12V Adapter Plug (5 / 10 / 20 Pairs)
Regular price From $7.99 USDRegular price -
35 ft Kester 44 Rosin Core Solder 63/37 (.020″) – Electronics Grade
Regular price $8.49 USDRegular price$10.49 USDSale price $8.49 USDSale -
DIY 21700 Power Bank Kit – Dual USB + USB-C + Optional Wireless Charging (No Cells)
Regular price From $13.61 USDRegular price$19.99 USDSale price From $13.61 USDSale -
DIY 18650 Power Bank Kit – Dual USB QC Fast Charging + LCD Display (No Cells)
Regular price $10.99 USDRegular price$19.99 USDSale price $10.99 USDSale -
DIY Mini Tube Power Bank Kit – USB Charger Stick (No Cell Included)
Regular price $3.99 USDRegular price$9.99 USDSale price $3.99 USDSale -
XT60 13 Inch Extension for Rc Battery Charger 14Awg Silicone Wire Male to Female
Regular price $9.99 USDRegular price
New Arrivals – Just Added
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Molicel P50B 21700 3.6V 4850mAh 25A Li-ion Battery Cell – High Power & Long Cycle Life
Regular price From $8.99 USDRegular price$9.99 USDSale price From $8.99 USDSale -
Enerkey 120A Smart BMS 3S–8S 12V–24V Li-ion / LiFePO₄ / LTO Battery Management System
Regular price $31.99 USDRegular price -
Enerkey 8S 24V 200A Smart BMS for Li-ion, LiFePO₄, and LTO Battery Packs – With Aluminum Heat Dissipation
Regular price $49.95 USDRegular price -
Enerkey 3S/4S 10–80A BMS (Peak 120A) with NTC & Cell Balancing – NMC / LFP / LTO / SIB
Regular price $44.99 USDRegular price
Rebuilding Power with Precision
Watch a DeWalt 20 V battery pack rebuilt using the same premium pre-cut nickel strips available at RenewSpark.
Shop Pre-Cut Nickel Strips →Blog – Battery Tips & Guides
View all-
What Nickel Strip Size Do You Need? The Complet...
Learn the right nickel strip thickness and width for battery building and tool pack rebuilds.
What Nickel Strip Size Do You Need? The Complet...
Learn the right nickel strip thickness and width for battery building and tool pack rebuilds.
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How to Troubleshoot a 2S 8.4V BMS (HW-391): Com...
A quick troubleshooting guide for the popular 2S 8.4V HW-391 BMS. Learn how to verify wiring, battery polarity, and charger setup so your 2-cell lithium pack charges and discharges correctly.
How to Troubleshoot a 2S 8.4V BMS (HW-391): Com...
A quick troubleshooting guide for the popular 2S 8.4V HW-391 BMS. Learn how to verify wiring, battery polarity, and charger setup so your 2-cell lithium pack charges and discharges correctly.
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Battery Upgrade Results: How Molicel P50B and P...
Real customer test results: Mike upgraded DeWalt packs with Molicel P50B and P30B cells, then ran constant-load discharges. The upgraded packs held higher voltage and delivered longer runtime compared to...
Battery Upgrade Results: How Molicel P50B and P...
Real customer test results: Mike upgraded DeWalt packs with Molicel P50B and P30B cells, then ran constant-load discharges. The upgraded packs held higher voltage and delivered longer runtime compared to...
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5S2P (18V) Power Tool Batteries: Why Every Bran...
Why do DeWalt, Makita, and Snap-on rely on the 18V 5S2P layout? Because it balances voltage, current, weight, and runtime. Here’s why 5S2P dominates—and how a professional rebuild can bring...
5S2P (18V) Power Tool Batteries: Why Every Bran...
Why do DeWalt, Makita, and Snap-on rely on the 18V 5S2P layout? Because it balances voltage, current, weight, and runtime. Here’s why 5S2P dominates—and how a professional rebuild can bring...
