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4S 40A BMS 12.6V Lithium Battery Charger Protection Board - Balanced

Zaitronics  |  SKU: Z0235
$7.50 AUD
$6.82 exc GST

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

  • 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
  • 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

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