18650 Battery Cell

18650 Battery Cell
Electric Bike (ebike) Battery Question: Getting 24 Volts in a Lightweight Package?

I’m in the planning stages of building an electric bike. Initially, I was going to buy a great quantity of lithium-ion cells (size 18650) and hook them up to provide me with 24 or 36 volts of power. But recently I have been thinking of using some quality lead-acid (think Optima!) batteries. The only problem is car batteries are pretty big! I am thinking that two Optima D51 batteries would be manageable– they are Optima’s smalles battery, but each one is still 26 pounds. They also provide 38 Ah (each!!!). Yah, that’s a lot of power, but also a lot of weight. My question is this: is there a viable means of converting 12 volts to 24 volts without substantial power loss? I would rather just use one Optima battery, but they only come in 12 volts. Also, can anybody recommend some small deep-cycle lead acid batteries in which I could put two in a serial configuration? Any other advice? Cheers and thank:)

“converting 12 volts to 24 volts without substantial power loss?”

You don’t get something for nothing. Yes, you could use a DC-DC converter, which would weigh a few pounds, but you would convert 12 volts at (eg) 10 amps to 24 volts at 5 amps, minus about 20 %, or 4 amps.

You need to go thru the numbers. Check the weight and power output of the Li-ion batteries, then check a 12v lead-acid with converter, then other alternatives. Calculate watt-hours per pound for each.

You can get watt-hours from amp-hours by multiplying it by the battery voltage. watt-hours is a unit of energy.

.

[5 min project]Charging 18650 battery with old mobile phone

Vamped Vapor Cells IMR 18650 2000mAh Flat Top Hi Drain Rechargeable Battery 40AMPS (2 PCS)
Vamped Vapor Cells IMR 18650 2000mAh Flat Top Hi Drain Rechargeable Battery 40AMPS (2 PCS)
$23.95
1pc Panasonic Ncr18650a 3100mAh 3.6 Volt Li-ion Rechargeable panasonic 18650 Battery
1pc Panasonic Ncr18650a 3100mAh 3.6 Volt Li-ion Rechargeable panasonic 18650 Battery
$5.81
Applications
* Building laptop battery, digital camcorder, digital camera, e-book, etc.
* Building portable power device that needs high energy density and low weight.
Product Specifications Specification
Item Content Capacity
Nominal Capacity: 3100 mAh
Typical Capacity: 2950 mAh
Minimum Capacity: 2950 mAh
Nominal Voltage 3.6 V
Internal Impednce 65 mohm
Discharge Cut-off Voltage 3.0 V
Max Cha…
TangsFire® (4 Pack) 18650 / 18350 16340 cr123a 4 Cell Battery Case (Blue Green Purple Orange)
TangsFire® (4 Pack) 18650 / 18350 16340 cr123a 4 Cell Battery Case (Blue Green Purple Orange)
$5.59
Specification:
1. Tpye: 18650 18350 battery Stroage case
2. material: ABS
3. The applicable objects: 18350 battery or CR123A/18650/16340 Battery
4. color: Blue Green Purple Orange
5. weight:20G
6. size: 77 X 22 X 40 (L x H x W) *cm
Package includes:
1 x 4Pcs TangsFire® 18650 / 18350 16340 cr123a 4 Cell Battery Case (battery not include)

This battery case is a perfect solution fo…

Superb Choice 12-cell Laptop Battery for GATEWAY 3UR18650F-2-QC-MA6
Superb Choice 12-cell Laptop Battery for GATEWAY 3UR18650F-2-QC-MA6
$32.99
Products trademarked Superb Choice are registered and marketed by Superb Choice.Replacement for GATEWAY 3UR18650F-2-QC-MA6Fit Machine Models:GATEWAY 6000 8000 MX6000 MX8000 M360 M460 M680 NX500 S-7500N series…
2 Pcs Black Plastic Battery Holder Case w Wire for 4 x 18650 14.8V
2 Pcs Black Plastic Battery Holder Case w Wire for 4 x 18650 14.8V
$6.67
This battery box holder with wire connector, fit for 4 x 18650 14.8V batteries.With spring clip design, you can easily to put the battery in it.Battery is not included here. …
EBL® UT-2110D Universal LCD Rapid Smart Charger for AA, AAA, C Cell, D Cell, 9V Ni-MH / Ni-Cd Rechargeable Batteries, 18650, 26650, 22650, 18490, 18350, 17670, 17500, 17335, 16340, 14500, 10440 3.7V Cylindrical Li-ion Batteries And 3.2V LiFePO4 Rechargeable Batteries
EBL® UT-2110D Universal LCD Rapid Smart Charger for AA, AAA, C Cell, D Cell, 9V Ni-MH / Ni-Cd Rechargeable Batteries, 18650, 26650, 22650, 18490, 18350, 17670, 17500, 17335, 16340, 14500, 10440 3.7V Cylindrical Li-ion Batteries And 3.2V LiFePO4 Rechargeable Batteries
$23.99
Super Universal: Can charge for different types’batteries: AA,AAA,C,D,9V,18650,26650 Rechargeable Batteries. Worldwide Volage: Accepts input voltages ranging from AC 100-240V 50/60Hz 0.3A MAX, can be used all over the world Multiple DC Output Voltage: Output : DC 12V/1000mA 4 x (1.2V Ni-MH/Ni-Cd AA/AAA/C/D rechargeable batteries: 400mA) 4 x (3.2V/3.6V/3.7V rechargeable Li-ion batteries: 400mA) 1…
Battery Holders, Clips & Contacts PCB PLSTIC BATT HLDR SMT 2 CELLS
Battery Holders, Clips & Contacts PCB PLSTIC BATT HLDR SMT 2 CELLS
$8.95
Keystone 1048 holders are widely considered to be the best 18650 battery holders available. These are original Keystone parts….
EBL® 4 Pack 18650 3.7V 2600mAh Rechargeable li-ion Battery with Universal Charger for 10440,14500,16340,18500,18650 Rechargeable Li-ion Battery
EBL® 4 Pack 18650 3.7V 2600mAh Rechargeable li-ion Battery with Universal Charger for 10440,14500,16340,18500,18650 Rechargeable Li-ion Battery
$13.99
OFFER ON THANKSGIVING USD$16.99 – LIMITIED TIME FROM 27,Novenber 7 TO 05,December

About EBL®

EBL® is a certified brand manufacture that product EBL® series general use battery ,battery charger and flashlight.All products and packages are marked with EBL® which can only enjoy the rights by seller and manufacture ’30 days money back and 1 year limited warranty ‘.All EBL® chargers are u…


Incoming search terms:

  • 18650 battery from walmart
  • 18650 Battery Walmart
  • 18650 battery
  • Where to Buy 18650 Batteries
  • 18650 battery weight
  • 18650 battery where to buy
  • where can you buy 18650 batteries
  • what store sells 18650 battery
  • what store carries 18650 batteries
  • what products have 18650 batteries
  • were to buy battery number 18650
  • walmart 18650 batteries
  • tesf amps 18650 battery
  • 18650 battery 3500mAh walmart
  • 3 7V Battery Walmart
  • 18650 walmart
  • stores that sell 18650 batteries