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Description
4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module4S 40A Li ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14. 8V 16. 8V Lipo Cell Module Now this 4S 40A balance version has upgrade to new ! 1, increased anti interference function, 2, reduce the large current heat by 30%, 3, starting power increased from 135W to 220W (4S40A) Integrated 10 low load resistance MOS tube, continuous discharge 40A, 100mA balanced current, for electric drill sprayer LED lights low
4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module
Now this 4S 40A balance version has upgrade to new !
1, increased anti-interference function,
2, reduce the large current heat by 30%,
3, starting power increased from 135W to 220W (4S40A)
Integrated 10 low load resistance MOS tube, continuous discharge 40A, 100mA balanced current, for electric drill/sprayer/ LED lights/low power inverter.
4S 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)
Charging voltage: 16.8V - 18.1V
Continuous charge current (upper limit): 20A
Board Size: 46*60*3.4mm
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
Note:this item is Balanced version .If you need other Version,please contact us.The 2 version price is different
Balanced version: suitable for starting current below 80A, power 135W below the drill.(with balance)
Note 1: The successful start of the electric drill requires four 15C-20C power batteries, or eight 10C-15C power batteries (ordinary 18650 can not start drill! ! !).
Note 2: Connect 0V, 4.2V, 8.4V, 12.6V, and 16.8V in strict accordance with the diagram. Do not intentionally short circuit.
Note 3: When the battery is charged, “430” resistance heating is a normal phenomenon, indicating that the equalizing circuit is working; if the “430” resistance is also heating in the state of not charging, please check whether the wrong line is connected.
Note 4: 4 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use in series. The The Discharge test, the voltage drop faster battery that group is poor battery.
Package:
1* 4S 4A Balance Version Protection Board
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
True to Description
Color: Black, Size: 4 Panel
Love it!! I bought it for privacy while the nurse is dressing my dad. There were several colors black matched the decor . It blocked the sunlight and street lights. Durability and quality very good. Easy closure when not in use. Lightweight. No assembly needed
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Nice room divider!
Color: White, Size: 8 Panel
The white panels are a nice off-white color. shipped in perfect condition. Already assembled so set up was quick. We use them to separate a photo studio from the main entry. Easily covers a 6 Ft. opening to the room. They are a woven material with wood colored sticks to support the weave. They are about 6 Ft. tall at the top of the curved section but less at the hinged sections. Light and easy to set up and take down. We are straddling two different floors so the extended legs at the bottom make this easy. Not sure how to clean them but they look great so far!
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Reviewed in the United States on October 21, 2025
★★★★★ 5
Instant Privacy
Color: Beige, Size: 8 Panel
Bought this to separate a ground level living area used as an office. Works well to cover visual clutter; allows a clean look when entering the front door. Comes fully assembled. Hinges are sturdy enough, as long as the panels aren’t stretched too far; have to allow some bend between them. For the price point, quality and functionality are satisfactory.
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Reviewed in the United States on August 22, 2025
★★★★★ 4
Great Divider, Just Needed Anchoring for Outdoor Use
Color: Grey, Size: 6 Panel
This room divider is very nice—stylish, lightweight, and easy to set up. I’m using it outdoors, which may not be its intended use, and I found that wind can knock it over pretty easily. Once I anchored it down, though, it worked just fine and looks great in the space. Indoors, I imagine it would be perfect right out of the box. Overall, a solid purchase with just one small adjustment needed for my setup.
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Reviewed in the United States on May 2, 2025
★★★★★ 5
Good Quality
Color: White, Size: 4 Panel
They are made with good quality. However I bought them to help with blocking outside light and the white does not do that.
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Reviewed in the United States on May 26, 2026