| Action | Frequency | How‑to | |--------|-----------|-------| | Full charge‑cycle (0 % → 100 %) | Every 1–2 months | Use the supplied PD charger; let the unit rest for ~30 min after full charge. | | Cleaning | As needed | Wipe the exterior with a dry, lint‑free cloth. Do not use solvents. | | Firmware check | Occasionally (if supported) | Connect to the BatPower app (Android/iOS) via Bluetooth; the app can display firmware version and prompt updates. | | Storage | Long‑term (> 6 months) | Store at ~3.7 V per cell (≈ 50 % charge) in a cool, dry place. |

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The most reliable source is the manufacturer’s website. Go to batpower.com (or your regional domain) and navigate to the Support or Downloads section. Search for “ProE 2.” If the manual isn’t listed, use the live chat and politely request the PDF. Companies often provide it upon request at no charge.