Cheapest car battery charger

Cheapest Car Battery Charger Promotion-Shop for Promotional

Depending where you live, electricity is rather cheap. Here's some math and some definitions, to take some of the mystery out of car batteries.

Amp-hours: Car batteries have a range of capacities, measured in Amp-hours. The Ampère is the unit of electrical flow: 1 Amp is a flow of 1 Coulomb (unit of electrical charge) per second. An hour is 3600 seconds, an Amp-hour is a flow of 1 Amp for 1 hour, so an Amp-hour is 1 Coulomb/second x 3600 seconds, so a total electrical charge of 3600 Coulombs.

Battery rating: Car batteries have a range of ratings, lets pick 45 Amp-hours. Since an Amp-hour is an electrical charge of 3600 Coulombs, this means that a car battery with a rating of 45 Amp-hours has an electrical charge of 45 x 3600 Coulombs, or 162, 000 Coulombs.

Car Battery Electrical Energy: Electricity from a typical car battery is delivered at 12 Volts. The Volt is the unit of electrical potential and is equivalent to a potential of 1 Joule (unit of energy) per Coulomb. So, at 12 Volts, our 162, 000 Coulombs car battery is storing 12 Joules/Coulomb x 162, 000 Coulombs, or 1, 944, 000 Joules.

kW-hours: Home electricity is usually billed in kW-hours. A kW (kiloWatt) is the unit for the rate of energy consumption, equivalent to 1 kJ (1000 Joules) per second. So, 1 kW-hour is a rate of consumption of 1 kW for 1 hour, or 1 kJ/s x 1 hour. An hour is 3600 seconds, so 1 kJ/s x 3600 s means a kW-hour is a consumption of 3600 kJ.

kW-hours needed to charge your battery: Assuming 100% efficiency (which will not be the case), the car battery will use 1, 944, 000 Joules to get a full charge, or 1, 944 kiloJoules (a simple unit conversion). Since each kW-hour represents 3600 kiloJoules, a full charge for our car battery represents 1, 944 kJ x 1 kW-hour/3600 kJ, or 0.54 kW-hours.

Cost of home electricity: This varies greatly with location, so let's pick $0.10/kW-hour. Our cost to fully charge our battery (again assuming 100% efficiency, which won't happen) is 0.54 kW-hours x $0.10/kW-hour, or $0.05.

So, fully charging your car battery will cost you about 5 cents of home electricity. A new battery is in the $100 range. How long will the charging take depends on the power of your charger, with 10-16 hours being typical (slow is good, puts less strain on the battery internals).

Jump Starter Power Supply battery booster For Car ,12000mAh High Capacity,Dual USB Charginhg Ports,Special SOS Signal with 4 LED indicators By HOME IMPRESSIONS
Home (DFL)
  • Charging:For all kinds of cars 30~50 times to jump start, recharges in just 5 hours using the USB charger,for other devices, with more power lighting for more than...
  • Portable USB Charger:With 12mAh capacity.Input--5V/2A.Output--5V/2.4A(Max),12V/3W(Max,)charge smartphones, tablets, kindles cars and other devices.
  • Powerful light& and Emergency light:It can be use to a LED torch and dispatch a SOS signal in an emergency.
  • Excellent design:Aluminum alloy housing is comfotable to handle according to your hand.Portable compact design that will easily fit in your pocket, backpack, or...
  • What you get: HOME IMPRESSIONS Jump Start Power Bank, crocodile clamps and an charger USB cable.
Micro USB Cable PowerLine Micro USB MortyMart 2A Quick Charge Durable High Speed USB 2.0 A Male to Micro B Sync and Charging Data Cables for Samsung for Android Smartphone&Tablets (1 Pack White 6Ft)
Wireless ()
  • Quick Charge : Support higher charging current up to 2A for Quick Charge USB 2.0 enable devices
  • Data transfer: Supports 480-Mbps transmission speed, error-free data transmission. 2-in-1 function: charging and transferring data simultaneously, for simple charging...
  • Device fit: Most Android and Windows phones, tablets and devices including Samsung / Nexus / HTC / Motorola / Nokia / LG / Sony / OnePlus / Blackberry / PS4 / Xbox...
  • Superior Construction: Durable TPE coating, Metal-Plated Connectors and heat-resistant cable head ensure maximum performance with a rated 8+ Bend Lifespan
  • The MortyMart 6 Ft Micro USB Cable. Easy use for your life. Note : it is not Type-C USB, NOT fit Type-C USB devices
Bestpriceam-003 Bestpriceam® Universal Car 12v to 24v 3port Usb Charger Adapter for Iphone Cellphone GPS (Gold)
Wireless (Bestpriceam-003)
  • Material: Plastic
  • Mini size and beautiful design
  • Input: DC 12V-24V
  • Output: DC 5.0V 2.1A or 5V 1A
  • Use your existing USB charge/sync cable for charging (USB Cable not included)
Bestpriceam Bestpriceam® 2 USB Charger Supply+2 Socket Car Cigarette Lighter Extender Splitter
Wireless (Bestpriceam)
  • New generic 2-Way Car Cigarette Lighter Socket Splitter + USB Port.
  • Simply plug into car s cigarette lighter socket.
  • Suitable for Cellphone(iPhone3G 3S,4G,4S,5G), GPS, Ipod and PDA etc.
  • LED charging indicator, Very convenient and easy to use.
  • Double socket with 12V / 24V output, Brand New high Quality
Skiva 9.6A 48W 4-Port USB Passenger Car Charger with Extended (6ft) Dual USB Ports for Backseat Charging of Smartphones,Tablets, iPhone 6 6s plus SE, iPad Pro Air mini, Galaxy S7 S6 Edge [Model:AC135]
Wireless (Skiva)
  • FASTEST: 9.6 amps / 48 watts of power gives fastest charging output of 2.4A per port for Skiva PowerFlow Quad C-4 Car Charger. Allows you to charge four iPad Pro...
  • FRONT & BACK: Equipped with 2 USB ports for the driver and font passenger; and a 2-port USB HUB for the backseat passengers. With a 6-foot (6ft) cable length...
  • INTELLIGENT: Detects the input current of the connected devices to maximize both compatibility and charging speed of upto 2.4 Amps each port or 9.6 Amps overall...
  • COMPATIBILITY: Supports fastest charging for iPhone 6s 6sPlus 6 6Plus 5s 5 SE, iPad Pro Air mini, iPod touch nano, Samsung Galaxy S7 S6 Edge+ Note5 Note4, Samsung...
  • UNIVERSAL: All the 4 USB ports are universal, so you can charge any four USB based devices simultaneously at fastest possible speed. It can charge your GPS, Bluetooth...

Related posts: