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- SKU: 04193
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4S 40A 18650 16.8V BMS For Lithium Battery Protection
This is a 4 Series 40A 18650 Lithium Battery Protection Board 16.8V with Balance for Drill Motor Lipo Cell Module. The 4S 40A BMS Module comes with recovery function AUTO Recovery and Integrated 10 low load resistance MOS tube.
Features
- 4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery).
- Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery).
- Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version).
- Charging voltage: 16.8V.
- Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use).
- Continuous charge current (upper limit): 20A.
- Equalization version: suitable for starting current below 80A, power 135W below the drill.
Specifications
- Short circuit protection
- Overcharge protection
- Over-discharge protection
- Overcurrent protection
- Overcharge Voltage per cell: 4.2V
- Maximum Working Current: 40A

Warranty Terms :
Branded products (Waveshare/ Raspberry Pi/ Radxa/ DWIN etc) are as per brand warranty terms. Generic products are eligible for replacement within 7 days of delivery based on following conditions.
Products are eligible for a replacement if there is physical damage during transit or a clear manufacturing defect. Any claim for damage/ wrong items/ replacement must be made within 48 hours of successful delivery of the product. Requests for refund of amount or exchange of product(s) will be reviewed on a case by case basis and HUBTRONICS carries final rights to take a final decision on refund, store credit or exchange.
What to take care of ?
Most of our products are technical in nature and require trained personnel to handle them. Any kind of mishandling can result in damage or malfunctioning of the product, it is not possible for us to provide a replacement or refund if the product is damaged due to technical or physical mishandling.
Who pays the return shipping cost?
Free of cost return pickup from delivery address is eligible for products categorized as manufacturing defect/ Damage in transit/ Wrong items delivered. We do not support return pickup for any B2B order or offline orders not placed on website. Buyer need to arrange return shipping for B2B orders.
What voids warranty?
Please note that replacement/ return or refund is not possible if the product is not compatible with your system/application. Please check all the technical details/ dimensions etc. before ordering and contact us for any kind of clarifications.
If product is soldered/ programmed at any point or physically altered in any way, it is not eligible for return/ replacement. If the item requires soldering for testing, please ensure that you use suitable clips or jig to test it without soldering. Any kind of soldering job makes the product ineligible for return or replacement.
Following items are not eligible for return under any circumstances
- Device Programmers / Dongles
- Soldering Consumables (Wire, Flux etc)





