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The BUTURE 4000A is a pocket-sized lithium jump pack rated at 4000 peak amps, enough for most gas engines and many diesel engines. It doubles as a 16,800mAh power bank and has a built-in LED light for roadside work. It suits drivers who want a glove-box backup for a dead battery and campers who need phone charging off-grid. Against rivals like NOCO Boost and Gooloo, it claims higher peak amps at a lower tier, but peak-amp claims are marketing figures and real cranking performance varies. Owners rate it 4.5 out of 5 across 215 ratings, with most praise for starting cars on the first try and complaints centered on cable clamps and charge retention.
In stockSold by UTRAI Official StoreReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Owners rate it 4.5 out of 5 and most say it starts dead cars on the first attempt, including in cold weather. Complaints focus on the jumper clamps and on the pack losing charge between uses.
The BUTURE 4000A Portable Car Jump Starter is a compact, lightweight jump starter. It is small enough to fit in a glove box or backpack. It jump-starts gas and diesel engines.
It also works as a 16800mAh power bank for charging devices. A multifunctional LED light is built in for roadside safety. The unit is built to be rugged, weatherproof and safe to use.
