Battery not recognized

Overview

Drone or charger does not recognize battery.

DJI Intelligent Battery, LiPo/LiIon FPV packs, ISDT/Q6 charger, XT30/XT60.

Symptoms

Typical "Battery not recognized" signs in flight, app or OSD:

• DJI — battery communication error
• Won't power on with aftermarket pack
• Charger — no cell reading
• Log cycle count and cell voltage after each flight.

Common causes

Before replacing parts, rule out software, mechanical and environmental causes:

• Damaged BMS or comm pin
• Non-OEM battery without DJI chip
• Corroded contacts
• Firmware update — battery whitelist

Tools needed

Prepare before diagnostics — saves time in the field:

• Multimeter
• LiPo storage bag
• Balance charger with cell readout

Step-by-step fix

Work safely: battery off when working on ESC/motors; props removed; after repair — VLOS test flight.

• Clean contacts with isopropyl alcohol.
• DJI: use original or approved packs.
• Check pins not bent in slot.
• Aftermarket — verify compatibility with model.

Additional diagnostics

Log cycle count and cell voltage after each flight.

IR test on aged LiPo — uneven resistance = replace.

Cold battery — slower GPS and voltage sag.

When to contact service

If any of the following apply — do not fly and contact authorised service:

• Battery swollen, smells or smokes — dispose immediately.
• Cell below 2.5 V or short — do not charge.
• DJI BMS error after several attempts — use OEM battery.

Prevention

Prevention reduces failure risk and supports EASA Open / VLOS compliance:

• Original batteries for critical missions

Frequently asked questions

Is it safe to fly with "Battery not recognized"?

No if the fault affects navigation, power, ESC or link. Fix on the ground first, then conduct a VLOS test flight in open area.

How long does diagnosis take?

Most “Battery not recognized” cases — 15–45 min on the ground. Complex ones (firmware, hardware) may need 1–2 h and service.

Must I register repair with the NAA?

No mandatory repair registration, but a maintenance log is recommended for commercial operations.