4S 40A BMS 12.6V Lithium Battery Charger Protection Board - Balanced
4S 40A BMS 12.6V Lithium Battery Charger Protection Board - Balanced is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Delivery Options
We offer several delivery choices to fit your needs:
- FREE Delivery: $0. Enjoy Free AusPost Parcel Standard Delivery on orders over $100 in value. Exclusions may apply.
- AusPost Untracked Letter: $3. Delivery in 3-8 business days (untracked). No refunds or replacements without proof of receiving the order.
- AusPost Parcel Standard: $9. Tracked delivery in 2-6 business days.
- AusPost Parcel Express: $13. Express tracked delivery in 1-3 business days.
- Pickup: $0. Email us to arrange a pickup from our location in Huntingdale 3166 in Melbourne at support@zaitronics.com.au. More details can be found in our contact page.
Additional Information
- Non-metro addresses in WA, NT, SA & TAS may require extra time.
- Certain batteries (like LiPo) cannot be shipped by air, affecting Express Post availability.
- We recommend selecting tracked options for valuable items. Untracked orders will not receive tracking numbers or refunds without proof of delivery.
- Note: Wherever possible, we will combine orders to save on shipping and reduce packaging waste.
- Note: Orders containing backordered item will delay delivery until all items are available
Warranty & Refund Policy
Warranty & Refund Policy
Warranty & Refund Policy
- Standard Warranty: 12 months for all products. Low-cost hobby parts have a 90-day warranty unless safe handling is shown.
- Exceptions: Kits and interfaceable electronics may not be covered if damaged due to misuse.
- Returns: Contact support via your order confirmation email within 14 days of purchase. Items must be unopened and in original packaging. Proof of purchase is required.
- Defective/Damaged Items: Notify us within 30 days for a free refund or replacement. Exclusions apply.
- Return Shipping Costs: Paid by the customer unless the item is defective. Shipping costs are non-refundable.
This 4S 40A Balanced BMS is designed to manage 4-cell lithium battery packs using 3.7V nominal cells, including 18650, 26650, and lithium polymer types. It features built-in active balancing to ensure each cell is charged to the same voltage level, helping maximize pack performance, reliability, and lifespan.
Suitable for applications such as electric tools, e-scooters, energy storage, and DIY battery systems, the board provides all the essential protections while maintaining balanced cell voltages.
Key Features:
- Supports 4S (4-cell series) lithium battery packs
- Nominal Pack Voltage: 14.8V / Max Charging Voltage: 16.8V
- Continuous Discharge Current: Up to 40A
- Balanced Charging: Actively equalizes cell voltages during charge
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Protection Functions:
- Overcharge protection
- Over-discharge protection
- Overcurrent protection
- Short-circuit protection
- Automatic Fault Recovery
- Ideal for: Battery packs that are frequently charged/discharged and require cell health maintenance