About this replacement
Makeblock Orion / mBot Ranger Series — 7.4V Li-ion Replacement Battery (14026)
This 7.4V 2600mAh Li-ion battery replaces part number 14026 in Makeblock's Orion, mBot Ranger, Ultimate, and Ultimate 2.0 programmable robot platforms. It fits the battery bay directly and connects to the onboard power circuit that drives both the microcontroller and motor outputs. Capacity is 2600mAh (19.24Wh) — matched to the original spec.
- Orion and mBot Ranger platform fit: These models share the same 7.4V two-cell Li-ion power rail, connector pinout, and BMS handshake — one battery covers all four variants without modification.
- Bench tested on actual hardware: We ran this battery under combined servo and motor load on the Orion board. The BMS held charge delivery stable across full motor extension cycles with no spurious low-voltage cutoff.
- Program export before battery removal: The Orion stores user programs in RAM backed by the main battery. Pull the battery without exporting first and your programs are gone. Use the Makeblock app or mBlock software to export all saved programs before you swap the battery out.
Motor movement imprecise after installing a new battery
Servo and DC motor calibration data on the Orion is stored in volatile memory that clears on a full power cycle. When you fit a new battery, the robot powers up without its previous calibration offsets. This causes movement to drift — turns come up short, arm positions shift, and line-following behaviour degrades. Recalibrate all motors through the mBlock app immediately after first power-on with the new battery.
Robot not connecting to the programming app after battery swap
The Orion's onboard Bluetooth module loses its paired-device state when power is fully removed. After fitting a new battery, the module broadcasts as an unpaired device rather than reconnecting automatically. Open the Bluetooth settings on your device, remove the old Makeblock entry, then scan fresh and re-pair. Once paired, the connection restores normally and programming resumes at 115200 baud.