Mathorn Battery MB-140 Ultimate 1270 mAh replacement for Olympus LI-92B LI-90B
Mathorn MB-140 Ultimate 1270 mAh – Replacement Battery for Olympus LI-92B / LI-90B
The Mathorn MB-140 Ultimate is a replacement battery for the Olympus LI-92B and LI-90B, built for compact Olympus and OM SYSTEM cameras – including rugged models in the Tough series. It works equally well for everyday shooting and outdoor trips where dependable power is critical, such as underwater photography, cold-weather hikes, or full-day travel.
Capacity matching the original
The battery offers a nominal capacity of 1270 mAh and 4.6 Wh of energy, matching the specifications of the original Olympus LI-90B. It maintains stable voltage during burst shooting and 4K video recording. It is also a straightforward way to bring older cameras back to full runtime when their factory batteries have degraded over time.
Backup power in the field
Frequent use of the LCD screen, image stabilization, GPS tracking, and high-resolution video quickly drains a camera battery. Thanks to its compact size and low weight, the MB-140 Ultimate easily slips into a pocket or camera pouch as a spare, letting you swap cells and keep shooting without hunting for a power outlet.
Lithium-ion cell
The battery uses a selected lithium-ion (Li-ion) cell offering high energy density in a compact form factor. Because Li-ion technology has no memory effect, you can top up the battery at any charge level without having to drain it first.
Compatibility
The battery works with chargers supporting the LI-90B / LI-92B standard (including the original Olympus UC-90 charger) and the following camera models:
- OM SYSTEM Tough: TG-7
- Olympus Tough: TG-1, TG-2, TG-3, TG-4, TG-5, TG-6
- Olympus Stylus: XZ-2, SP-100
Main advantages
- 1270 mAh (4.6 Wh) capacity: Runtime on par with the original Olympus LI-90B battery.
- Selected Li-ion cell: Consistent power delivery under heavy loads like burst mode and 4K video.
- No memory effect: Safe to recharge at any point without affecting long-term capacity.
- Wide operating temperature range: Rated for discharging from -20°C to +60°C, making it reliable in both freezing conditions and summer heat.
- Full compatibility: Works seamlessly with supported Olympus/OM SYSTEM cameras and dedicated chargers.
Technical specifications
| Parameter | Value |
|---|---|
| Nominal capacity | 1270 mAh |
| Nominal voltage | 3.6 V |
| Maximum charging voltage | 4.2 V |
| Standard charging current | 540 mA |
| Maximum charging current | 750 mA |
| Total energy | 4.6 Wh |
| Charging temperature range | 0°C ~ +40°C |
| Discharging temperature range | -20°C ~ +60°C |
