YESPER Battery Leap Starter – 4120A Peak Moveable Automobile Starter (All Gasoline, as much as 10.0L Diesel Engine), Auto Battery Booster Pack,Leap Field, DSLI Secure Tech Safely Begin All 12V Automobile& DC 15V Ports

Works well
holds charge for months (at least 6 months) while tucked away under seat waiting to be used. I helped a guy who asked me for a jump. He was blown away that it started his Subaru without hesitation. Haven’t tried it on a V6 or a V8 yet…Nice storage case, and overall quality is great. Better than my NORCO GB40 without a doubt (so far). My NORCO battery wouldn’t take a charge after leaving it unused for about a year. This is its replacement. We’ll see.

Good Battery Life. Strong plastic smell
I have tried the following Jump Starters and since most of the time I will be using it for charging devices my review is for how good the batteries are for charging mobile devices and how well they hold the charge. They are all over 2500A and do a good job with jump starting of my SUV.My recommendation: If you don’t need voltmeter and digital display then any of the DBPower jump starters or Yester are good. If you need voltmeter then Mostools and Imazing are the best.Mostools M6 3000A – Looks high quality product with one of the thickest and biggest jump starter cables. – Takes less than 5 hours to charge – Good battery. Can charge over 3 Mobile phones – Plugging in phone automatically starts the jump starter and when done automatically powers off the jump starter. – Very powerful LED light. 2 separate power buttons for charging and LED lights. – Large Display and good case. – Contains Voltmeter to measure the battery level of Cars battery. However once charges the Jump Starter turns off and you cannot see after charge battery level. The manual says that when the output battery voltage is higher than Jump Starters battery voltage it turns off. – All the USB ports are 3A for fast charging which helps with quick charging your mobile devices. – Also the only one in the list which comes with charger. – 24 months warranty. Support is available through Seller messages to NCYJC. – Bad: Their phone no and emails on the user manual yield no response. There is no cigarette lighter adapter.YaberAuto 3000A – Small one and doesn’t look high quality – Takes upto 6 hours to charge – Bad for charging. Only one mobile phones charging takes up 80% of the charge from the jump starter battery. – Need to start the jump starter to charge and need to remove the plugged in device to automatically stop it. – Average LED Light. Power and Lights are controlled from the same button with long press for lights. – Small display – Contains volt meter on the charging cable – 2.1 and 2.4 A USB ports only so no fast charging for latest mobile phones – No charger for the jump starter – 24 months warranty however there was no response to my questions/requests from their website.DBPower 2750 & 3000 – Very high quality and compact. The best looking in all I have reviewed. Jump starter cables are still better in Mostools – 5-7 hours to charge the jump starter battery – Good battery. Can charge about 3 Mobile phones (for 3000A over 3 mobile phones) – Need to turn power on to charge mobile device – Average LED lights. One power button for both LED and power. – No display and excellent case. – No Voltmeter – Fast charge available USB Ports. USBC in out and 1 USB fast charge port. One USB port at 2.1A – No charger for jump starter – 12-18 months warranty. Best customer service in this entire list. You can chat online from their website and they follow through to closure. The warranty varies by product so please check warranty.Buture 2500A – Average quality and everything is similar to YaberAuto hence not highlighting all the points. – Bad for charging. Only one mobile phones charging takes up 100% of the charge from the jump starter batteryYesper 4120A – Good quality. Although had plastic smell the most out of all in this list – Takes 8 hours to charge the jump starter – Good battery. Can charge over 3 Mobile phones. Plugging in phone automatically starts the jump starter and when done automatically stops the jump starter – Average LED lights. One power button for both LED and Power – No display and excellent case – No voltmeter – Fast charging available including USBC in/out at 3A – No charger for jump starter. Cigarette Lighter female cable available – 18 months warranty. No response for my queries from Yesper siteImazing IM29 from Costco – Good quality however a bit expensive compared to all the above – Over 5 hours to charge the jump starter – Good battery. Can charge upto 3 mobile phones. Need to start the jump starter to charge the mobile device. – Average LED Lights. One power button for both – Display available and excellent case – Some reviews say that voltmeter exists however the one I purchased didn’t have voltmeter on the cable – Fast charge available USB Ports. USBC in out and 1 USB fast charge port. One USB port at 2.1A – No charger for jump starter. Cigarette Lighter female cable available – 24 months warranty. No response from support which is why I returned this product