Pay in installments of $9.35 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
BMT 4S LITH BATT CHARGE/PROT 40AS 40A Li Ion Lithium Battery 18650 Charger Protection Board Module 18650 Charger Protection Board Module Specifications 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, polymer lithium battery) Product Size: 45 * 55 * 3. 4mm (Standard Edition Enhanced), 46 * 60 * 3. 4mm (balanced version) Product weight: 9. 3g (standard
S 40A Li-Ion Lithium Battery 18650 Charger Protection Board Module
18650 Charger Protection Board Module
Specifications
- 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, polymer lithium battery)
- Product Size: 45 * 55 * 3.4mm (Standard Edition / Enhanced), 46 * 60 * 3.4mm (balanced version)
- Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version)
- Charging voltage: 16.8V - 18.1V
- 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.
Project Min. Typ. Max. Units Consuming current 12 18 24 uA Overcharged protection voltage 4.2 4.25 4.3 V Balanced starting voltage 4.17 4.2 4.23 V Equilibrium current 95 100 105 mA Balanced heating power 1.56 1.72 1.91 W Overcharge recovery voltage 4.1 4.15 4.2 V Over-discharge protection voltage 2.4 2.5 2.6 V Overvoltage protection after over-discharge protection 2.8 3 3.2 V Overvoltage protection after over-discharge protection 3.2 3.5 3.8 V Over-discharge recovery voltage 2.9 3.2 3.3 V Conduction internal resistance 2.5 3 3.5 mQ Overcurrent protection current C 70 80 90 A Overcurrent delay time 100 150 200 ms Continuous operating current 0 40 40 A Continuous output power 0 672 672 W Ambient temperature -40 25 85 °C
Troubleshooting: Fault phenomenon Fault check and cause The solution Unable to charge Measuring the voltage of 4 groups of batteries.
when one of the battery voltages exceeds 4.25V,
the protection board will activate overcharge protection.Pair the battery pack well, do not mix
the good battery and the bad battery.Unable to discharge Measuring the voltage of 4 groups of batteries.
when one of the battery voltages is lower than 2.7V,
the protection board will activate the over-discharge
protection.Pair the battery pack well, do not mix
the good battery and the bad battery.Charging/discharging
failureOV, 4.2V, S.4V, 12.6V, 16.8V miswired Rewire or replace the new board
(human failure, no warranty)Overcharge/overdischarge
failureOV, 4.2V, 8.4V, 12.6V, 16.8V miswired Rewire or replace the new board
(human failure, no warranty)Discharge protection Check that the battery pack has sufficient discharge
capability and check that the load's starting current
exceeds the overcurrent protection current of the
protection board.Replace the battery pack with a higher
discharge capacity, or a protective
plate with a larger current
(super working range)Component soldering There is no connection between one of the components
and the PCB pad.Repair welding Component welding There is a short circuit between two or more pins of the
component.Remove the component and re-weld Electrostatic breakdown A In the unpowered state, measure the G, D, and S
poles of the MOSFET. If the forward and reverse
resistances of any two pins are 0Q,
it indicates that it has broken down.Remove the replacement MOS tube Electrostatic breakdown B Remove the MOS tube and measure the resistance
of the G and D, G and S poles of the MOS tube.
If there is a resistance indicating that it has broken
down, the resistance should be infinite.Remove the replacement MOS tube
Package includes:
1 x Battery Protection Board
Additional Information
| Device | Protection Board Module |
| Type | 18650 | Charger Protection |
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
- If time is of the essence, please consider selecting expedited delivery for faster service.
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 10 reviews
Sort
Product Reviews
★★★★★ 5
Nice
Size: Small, Color: Bunny, Size: Small, Color: Bunny
Cute, dog loves it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 1
Defective toy and inconsistent quality.
Size: X-Large, Color: Raccoon, Size: X-Large, Color: Raccoon
My initial review was 5 stars based on my experience with a previous order (blue raccoon) and the fact my puppy was immediately interested in it. However, I did not give it to her to play with until this past Friday (May 21, 2026) because she had the first one I bought. In a matter of 2 days the seam on the back and at the base of the head unraveled and all of the stuffing was scattered all over the room. I thought I’d found some good, high quality, toys for her but apparently this one was defective because the first one had had a lot of use and I’d still in decent shape. This is too much money to pay for a dog toy that only lasts a day or two so be advised they aren’t all good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
★★★★★ 5
Bigger, louder, crinklier, softer, than expected!
Size: X-Large, Color: Rabbit
My dog was gifted a collection of used toys and he really likes a very long stuffed pig which, unfortunately, another dog that is a destructive chewer, totally destroyed. I decided to break down and buy him another long stuffed toy today and since he's always blissfully watching rabbits in the yard and neighborhood I chose the rabbit version. This thing is huge which is great for him- he's 62 lbs and 7 months old and only half grown. He loves it, it has multiple LOUD squeakers, lots of crinkly spots, and fun ears/legs to grab hold off. He's a big fan and it's made with K9 Tuff Guard which LASTS. Super soft and easy to wash.
Update after 2 months- easy to wash and looks new after a washing. very durable so far, standing up to indoor and outdoor use. He is not a destructive chewer but whips them around, tramples on them, steps on them while running top speed and chomps on the annoying squeaker for hours. one squeaker has a hole and its tune is now slightly muted (thank god)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 24, 2019
★★★★★ 5
Absolute favorite toy for almost a year
My dog’s favorite toy for almost a year. It has held up amazingly. I’m sad it’s no longer available. Please bring it back!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
Very well made!
Size: Small, Color: Bunny
This toy is great! Two squeakers and made to last even my Airedale. He doesn’t want to put it down.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
recommand products
With the text Happy Birthday in whimsical script font - Art print of a couple of unicorns with a rainbow and stars
24.00
Pink Bracelet for Someone Special
24.00
Polished Stainless Steel Chalice and Ciborium 3"
185.50
Crater Lake, USA - Art print of a large body of water with a small island in the middle
399.00
Easter Bulletins: Jesus Lives!
11.00