Thingiverse
Battery Power Bank by wepollock
by Thingiverse
Last crawled date: 3 years, 1 month ago
I wanted a battery bank that could charge or run an IPAD, USB device, laptop, and/or any device for an extended number of charges or for an extended amount of time; I also wanted the versatility of a 12v cigarette adapter. The box had to be small, light, and pack a large number of watt hours. The battery also had to be able to deliver a large number of amps and have a good C rating. The device can be charged from the cigarette adapter and it can run a 19v laptop, or a 24v device with DC to DC converters. The printing and wiring of the device is simple. Lightweight lithium batteries of this caliber are expensive ($150) but SLA batteries are about $20. Care must be taken in connecting the wiring; care must be taken in using the correct charger, you should have the appropriate crimp tool, do not short the battery or confuse polarities. I used a screw and bolt as a terminal block for positive and negative, the screw connects to spade connectors. Spade connectors are included with the 12v car adapter, voltage meter, and usb converter. I used Silicone insulated 12 gauge wire (because I had spare wire); but the components are only rated for 5 amps; thus I could have used a much lesser gauge of wire. I use the same battery for other purposes and I want to support the maximum amperage possible for that battery. Please check the chart that talks about amps, distance, and voltage. CARE MUST BE TAKEN NOT TO SHORT THE BATTERY; ESPECIALLY WITH LIPO. K2 lists Caution warnings on the battery to which you must adhere to and be cognizant of.
Battery - Expensive
K2 12.8V LiFePO4 Battery Pack 9.6Ahr
K2 Energy K2C12V4A 12V 4Ah LiFePO4 Charger with Faston 250 Connectors
Replace Faston with BATTERY TENDER CIG CIGARETTE ADAPTOR check for amperage
Battery Cheap
12V 7.2AH Sealed Lead Acid Battery for Verizon FiOS PX12072-HG Re12V 1300mA Sealed Lead Acid Rechargeable Battery Charger For Car Motor Truck FCH
Velcro, Stick sided and regular.
Added in Line Fuse for short protectionhttp://www.ebay.com/itm/172295716987?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
-Replaced 15amp with 7.5amp auto fuse
Switch
Three Position Selector Rotary Switch Power Ignition LAY7-20X/3 US
Laptop Converters
DC/DC 12V To 19V 76W 4A Car Power Waterproof Supply Module Converter Regulator
Waterproof 12V Car Cigarette Lighter Socket USB Charger Power Adapter Outlet SM
Universal Dual USB Port Car Char V 2.1A and 5V @ 12V-24V
input
Cigarette Lighter Socket 12V Charger Adapter
Crimp tool and spade connectors.
Battery - Expensive
K2 12.8V LiFePO4 Battery Pack 9.6Ahr
K2 Energy K2C12V4A 12V 4Ah LiFePO4 Charger with Faston 250 Connectors
Replace Faston with BATTERY TENDER CIG CIGARETTE ADAPTOR check for amperage
Battery Cheap
12V 7.2AH Sealed Lead Acid Battery for Verizon FiOS PX12072-HG Re12V 1300mA Sealed Lead Acid Rechargeable Battery Charger For Car Motor Truck FCH
Velcro, Stick sided and regular.
Added in Line Fuse for short protectionhttp://www.ebay.com/itm/172295716987?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
-Replaced 15amp with 7.5amp auto fuse
Switch
Three Position Selector Rotary Switch Power Ignition LAY7-20X/3 US
Laptop Converters
DC/DC 12V To 19V 76W 4A Car Power Waterproof Supply Module Converter Regulator
Waterproof 12V Car Cigarette Lighter Socket USB Charger Power Adapter Outlet SM
Universal Dual USB Port Car Char V 2.1A and 5V @ 12V-24V
input
Cigarette Lighter Socket 12V Charger Adapter
Crimp tool and spade connectors.
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