It will charged the battery too ? Or is only a jump starter?

The manufacturer is correct, this is a jump starter only, not a charger. This unit only has a 35 watt hour capacity, it is not designed for charging. You need to purchase an appropriate 12 volt smart charger, such as a Noco Genius Charger. You should not need more than a 10 amp charger/maintainer. If you need a portable charging solution, there are large power stations with 110V AC inverters built in that you could plug a smart charger into. For example the Jackery 500 has a 518 watt hour battery with built in 110 volt (pure sine wave) AC outlet (500 watt max) for $500 on Amazon. It is 13 lbs, but I believe it would be just enough capacity to recharge a drained car battery with a Noco Genius charger. A typical car battery is about 50 amp hours of capacity. Say you had a battery that was at a 50% Depth of Discharge (recommended is 20%); this would be 25 amp hours @ 12 volts = 300 watt hours that need to be charged. Then you would have to account for AC inverter and DC converter inefficiencies. Therefore: (518 Wh x .85 x .8) / 300 Wh = 1.17 full charges. This should be just enough to fully charge a typical car battery. Keep in mind that this would not be enough to charge a larger (>50 Ah) deep cycle battery. P.S. The Noco Boost XL GB50 (jump starter) has 10,500 joules over 3 seconds = 292 amps @ 12V (for 3 seconds).

Will the novo boost 25000 charge cell phones

Yes, the Noco GB50 can charge a cell phone via the USB outlet. It's internal battery has 35 watt hours of capacity; or 9,459 mAh @ 3.7 volts. A typical cell phone has a 3,000 mAh battery. Here's a formula to determine number of charges: (power bank capacity x .85) / phone capacity = number of full charges (9,459 mAh x .85) / 3,000 mAh = 2.68 full charges

Can this be used on 4 cylinder motors?

Not answering for the makers but personally I have jump started a Tundra V8 and two SUVs with 4 cylinders and works great every time. Buying children these for Christmas. Will not ever use cables and another vehicle ever again.

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⚡ Never get stranded again—power, safety, and versatility in your palm!

RAPID RECHARGE - Fully recharges in just 5 hours via any USB port—always ready for your next adventure.
RUGGED READY - IP65-rated water-resistant, rubberized casing, and ultra-lightweight design for on-the-go durability.
ULTRA SAFE TECH - Spark-proof & reverse polarity protection means zero guesswork, zero sparks, zero stress.
POWERFUL COMPACT - 1500 amps to jump start gas engines up to 7L & diesel up to 4.5L—ready when you are.
MULTI FUNCTIONAL POWERHOUSE - Jump start, charge your devices, and light your way with a 200-lumen LED flashlight featuring 7 modes.

The NOCO Boost XL GB50 is a 1500-amp ultra-safe lithium jump starter designed for gasoline engines up to 7L and diesel engines up to 4.5L. It offers up to 30 jump starts per charge, spark-proof technology, reverse polarity protection, and doubles as a power bank and LED flashlight. Its rugged, IP65-rated water-resistant casing and lightweight design make it the ultimate portable emergency power solution.

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Brand	NOCO
Amperage	1500 Amps
Peak Output Current	1500 Amps
Manufacturer	NOCO
UPC	046221180176
Global Trade Identification Number	00046221180176
Product Dimensions	10.16 x 20.96 x 12.07 cm; 748.43 g
Batteries	1 Lithium Ion batteries required. (included)
Item model number	GB50
Manufacturer Part Number	GB50
OEM Part Number	GB50
Assembly Required	No
Country of Origin	USA

NOCO Boost XL GB50 1500 Amp 12V UltraSafe Lithium Jump Starter

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