Best Battery Backups Spec Sheet
| Battery Chemistry | Lithium-ion |
|---|---|
| Capacity | 35 Wh |
| Weight | 2.71 lb |
| Status | Current |
Verified specifications, runtime planning, compatibility and buying options for this exact model.
Cars, SUVs, light trucks, and 12V engines up to 7.0L gas or 4.5L diesel
Current record status: Current.
| Battery Chemistry | Lithium-ion |
|---|---|
| Capacity | 35 Wh |
| Weight | 2.71 lb |
| Status | Current |
Planning estimates use 85% usable energy. Actual runtime varies.
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Read Guide →The NOCO Boost GB50 is a compact 12-volt lithium jump starter designed for drivers who want more starting power than an entry-level pocket unit without moving up to a large commercial booster. NOCO rates the GB50 at 1,500 peak amps and specifies it for gasoline engines up to 7.0 liters and diesel engines up to 4.5 liters. That makes it a practical match for many cars, pickups, SUVs, vans, boats, and light-duty equipment that use a 12-volt lead-acid starting battery.
The GB50 is best for a vehicle owner who values a recognizable safety system, weather-resistant housing, useful integrated lighting, and enough capacity for repeated emergency starts. Its 35Wh internal lithium-ion battery is rated for up to 30 jump starts per charge under favorable conditions. Real-world results depend on engine size, battery condition, temperature, and how long the unit has been stored. This is an emergency starting tool, not a replacement for diagnosing a failing vehicle battery or charging system.
| Specification | NOCO GB50 |
|---|---|
| Peak current | 1,500 amps |
| Supported battery voltage | 12V lead-acid |
| Gas engine rating | Up to 7.0L |
| Diesel engine rating | Up to 4.5L |
| Internal energy | 35Wh lithium-ion |
| Rated jump starts | Up to 30 per charge |
| Flashlight | 200 lumens |
| Ingress protection | IP65 |
| USB input/output | 5V, 2.1A |
| Dimensions | 8.58 × 3.42 × 3.16 inches |
| Weight | 2.71 pounds |
| Warranty | 1-year limited warranty |
The strongest reason to choose the GB50 is its balance of output and portability. It is small enough to live in a trunk or emergency kit, but its published engine range covers vehicles that can be beyond the comfort zone of lower-output boosters. The spark-proof and reverse-polarity protection system helps prevent common connection mistakes during normal operation. The clamps are compact enough for crowded engine bays, and the sealed enclosure gives the unit an IP65 rating when its ports are closed.
The built-in 200-lumen LED is useful when battery trouble happens after dark. Multiple light modes make it suitable for steady work lighting or signaling. The USB port can also provide emergency power to a phone or other small USB device. That feature should be treated as a backup convenience rather than the main reason to buy the product, since preserving charge for a vehicle start is usually the priority.
This model is intended for 12-volt lead-acid batteries. Do not treat the engine-size rating as a guarantee that every vehicle within that displacement will start in every condition. A deeply damaged battery, extremely cold weather, poor cable contact, or a mechanical engine problem can prevent a successful start. Owners of larger diesel trucks or engines above NOCO’s stated limits should choose a higher-output model.
The manual-override function deserves special caution. It exists for situations in which the connected battery voltage is too low for the booster to detect normally, but engaging it disables the usual spark-proof and reverse-polarity safeguards. Users should follow the official instructions exactly and confirm clamp polarity before considering manual override. If the battery is damaged, leaking, swollen, frozen, or otherwise unsafe, do not attempt a jump start.
Recharge the GB50 after use and check it periodically while it is stored. Lithium boosters slowly lose charge over time, and a unit left unattended for months may not be ready when needed. Keep its ports closed in storage, avoid extreme heat, and do not leave it loose where the clamps or housing can be damaged. The supplied USB-C to USB-C cable makes routine charging straightforward, but charging time depends on the power source used.
The GB50 makes the most sense for households with a mid-size gasoline vehicle, a light truck, an SUV, or a smaller diesel application within the official 4.5-liter limit. It is also a reasonable step up for buyers who found 1,000-amp class boosters too restrictive. Drivers who only need to support a small four-cylinder car may be able to use a smaller NOCO model, while owners of heavy-duty diesels should look at a larger unit.
Before buying, confirm that the Amazon listing shows model GB50 and ASIN B07MVY7K43. Similar-looking NOCO products have different current ratings and engine limits. This page links only to the verified GB50 listing. Specifications were checked against NOCO’s current product and specification pages on August 28, 2026.