For battery selection advice, please provide your target voltage, capacity, continuous discharge current, and application. For existing orders, please include your order number for priority handling
WhatsApp Engineer Support
Instant support for cell specs, custom battery pack consultation, and urgent order updates
Response time: Within 1–4 hours (during our working hours)
Telegram Technical Desk
Direct messaging for DIY pack builders, FPV drone enthusiasts, and international buyers
Response time: Within 1–4 hours (during our working hours)
Email & After-Sales Ticket
Formal BOM quotes, datasheets, invoice requests, and 12-month warranty claims
Response time: Within 12–24 hours (during our working hours)
1. Charging & BMS Protection
Always use a dedicated lithium-ion or LiFePO4 smart charger. Never overcharge (max 4.20V for NCM/NCA, 3.65V for LiFePO4) or over-discharge cells without a certified BMS
2. Physical & Thermal Safety
Never short-circuit positive and negative terminals. Do not crush, puncture, incinerate, or expose cells to temperatures above 60°C or conductive metal objects
3. Pack Assembly & Spot Welding
Multi-cell battery packs must be assembled by qualified personnel using proper insulation rings, fish paper, and pulse spot welding. Never solder directly onto bare cell terminals
4. Long-Term Storage
Store cells at 40%–50% state of charge (approx. 3.6V–3.7V for Li-ion) in a cool, dry environment (10°C–25°C). Check voltage every 3–6 months to prevent deep discharge
Inspect Upon Arrival
Measure open-circuit voltage and internal resistance within 7 days of delivery before spot welding or soldering
Submit Test Proof
Send your Order ID, batch code photos, and multimeter/tester readings via WhatsApp or Email
Engineer Verification
Our QC team will cross-check your lot traceable inspection records within 24 business hours
Free Replacement / Refund
Confirmed defective cells or packs under normal use are eligible for free replacement or refund
30-Day Returns & 1-Year Limited Warranty
MIBANG-branded products are backed by a 30-day return policy and a 1-year limited warranty, subject to applicable exclusions
For individual battery cells, Dead on Arrival (DOA) or internal resistance (IR) mismatch claims must be submitted within 7 days of delivery, before any spot welding. Warranty coverage does not apply once the cells have been spot-welded
For full details, please refer to our Returns & Refunds Policy
