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

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…

8-Cell Battery for Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI
8-Cell Battery for Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI
$36.41
Compatible Models / PNs : Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI…
12-Cell Battery for Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI
12-Cell Battery for Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI
$46.19
Compatible Models / PNs : Gateway 4UR18650F-2-QC223 M360 M460 M465-E M680 MA1 MA2 MA3 MA6 MA7 ML6703 ML6720 MT3709 MT6705 MT6709 MT6711 MT6728 MT6729 MT6730 MT6821 MX6000 MX6453 MX6455 NX500 NX850 W340UI…

Vamped Vapor Cells IMR 18650 2000mAh Hi Drain Rechargeable Battery 40AMPS
Vamped Vapor Cells IMR 18650 2000mAh Hi Drain Rechargeable Battery 40AMPS
$14.94
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
$14.99
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 up to the standard of Indoor use only,Automatic charge,100-240V Worldwide Voltage,Environme…
DROK White LED 0.36 3.0~30V Small Voltmeter Digital 18650 Cell-phone Lithium Battery Tester 5/12V DC Voltage Meter
DROK White LED 0.36 3.0~30V Small Voltmeter Digital 18650 Cell-phone Lithium Battery Tester 5/12V DC Voltage Meter
$5.98
Features:
Cutting size: 23mm x 14mm
Thickness: 10mm
Mounting Hole Center Distance: 28mm
Measure Voltage:  DC 3.0~30V (No Need power supply, measure Directly)
Input Polarity: DC Voltage
Measurement Accuracy: 1% (+ / – 2 digit)
Display: Three 0.36″ digital LED Tube
Display Color: White
Refresh Rate: about 500mS / times
Operating Temperature: -10°c ~ 65°c
Reverse protection: have
when measure 10V …

Incoming search terms:

  • 18650 battery from walmart
  • 18650 Battery Walmart
  • 18650 battery
  • 18650 rechargeable battery Walmart
  • Tenergy 3 7v 3400mAh 2 cell battery pack with bare wire
  • Where to Buy 18650 Batteries
  • Walmart Electronic Batteries ULTRA Fire
  • ultra fire 18650 battery in stores
  • ultrafire 18650 walmart
  • ultrafire walmart
  • watts per 18650 cell
  • weight 18650 battery
  • what walmart products use 18650 battery
  • where to buy authentic 18650 battery charger
  • 18350 battery walmart
  • ultra fire 18650 battery from walmart
  • rejuvinate 18650 battery
  • 18560 ultrafire battery in stock
  • 18650 rechargeable batteries
  • 18650 walmart in store