Why matching matters more for drones
A drone battery must match its drone on voltage, capacity, fit, and connectors, as any battery must, but the stakes are higher: a drone in flight cannot be plugged in, and a battery failure in flight means a lost drone. A buyer should confirm compatibility for the exact drone variant, not just the drone kind, and should not use a battery that is not listed for that variant without confirming it first.
Weight matters more for drones than for other devices, because the drone carries the battery: a heavier battery reduces flight time rather than increasing it. The smart flight model is the lightest battery on this site, and its weight reflects that trade-off.
Safe handling in general terms
Handle drone batteries gently, keep them away from heat and water, and do not use a battery that is swollen, cracked, or damaged. Charge with a charger that matches the battery, in a place where a charging battery can be watched, and do not leave a charging battery unattended for long periods. Store batteries in a cool, dry place, within their stated storage range where stated, and do not store them fully charged or fully empty for long periods.
These are general terms, not a safety manual for a specific battery: the battery's own documentation, and the drone's documentation, should be followed where they differ. A buyer who needs safety documentation for a specific model should ask in the inquiry.
What to confirm before ordering
Name the model, the exact drone variant it must serve, the quantity you have in mind, and the market you sell into. Ask for the specification for the exact model, the minimum order quantity, the lead time with its meaning, the warranty terms, and the certificates that apply to your market, by name, with documents attached.
Before payment, confirm the minimum order quantity, lead time and warranty terms for your order. Certificates are available upon request.