Ultimate Speed ULGD 10 A2 Battery Charger: A Comprehensive Review

The Ultimate Speed ULGD 10 A2 is a versatile vehicle battery charger designed for both 12V and 24V batteries, with a capacity range of 20-300Ah. Priced competitively, this charger offers a range of features, including multiple charging programs and a backup power function, making it suitable for a variety of users from car owners to professional automotive services.

Design and Build Quality

The Ultimate Speed ULGD 10 A2 features a straightforward design, consistent with the brand’s aesthetic, utilizing a black and red color scheme. While functional, the charger is notably large and bulky, which may present challenges for storage or placement under the hood of a vehicle. The cable insulation is described as somewhat stiff, particularly in cold temperatures, and the clamps may not appear exceptionally robust. However, the inclusion of a backlit display is a welcome feature, enhancing usability in low-light conditions.

Connectivity and Versatility

A key advantage of the ULGD 10 A2 is its connectivity options. It includes a connector on the cable that allows users to attach either standard terminals or included terminals for permanent connection to the battery. This is particularly beneficial for those who frequently need to charge their battery or have a battery located in a difficult-to-access area.

Charging Programs and Functionality

The charger boasts ten selectable charging programs, five for 12V batteries and five for 24V batteries. These programs cater to various charging conditions, including normal charging, low-temperature charging, and AGM batteries. Detailed explanations of each program are provided in the user manual, which is recommended for reference.

Beyond standard charging, the ULGD 10 A2 can also function as a backup power source for vehicle electronics, supplying either 13.6 V/3 A or 27.2 V/1.5 A. While this feature is useful, users should be aware that switching back to charging mode after activating the backup power function can be problematic, requiring disconnection and reconnection of the charger.

Performance and Testing

In testing, the ULGD 10 A2 successfully charged a deeply discharged 12V car battery (down to 7.1V) without issue, a capability that some chargers lack. The charging process is fully automatic, progressing through desulphation, revival, main charging (up to 80%), slow charging (to 100%), monitoring, and finally, maintenance charging. The charger maintains a maximum charging current of 10 amps.

Conclusion

The Ultimate Speed ULGD 10 A2 offers a compelling combination of features and affordability. Despite some compromises in build quality, it effectively charges car batteries and provides the added benefit of a backup power function. It is a solid choice for vehicle owners and potentially useful for automotive professionals.

Where to Buy

As of March 14, 2026, the Ultimate Speed ULGD 10 A2 is available for purchase online. Amazon.it is one retailer currently offering the product.

You can locate the user manual here or here.