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

FlePow 18650 Battery Charger, Universal Smart Li-ion Battery Charger for 18650, 18500, 14500, 14430, 10440, RCR123A(16340), 22650 Most 3.2V / 3.6V / 3.7V Lithium-ion Rechargeable Batteries
FlePow 18650 Battery Charger, Universal Smart Li-ion Battery Charger for 18650, 18500, 14500, 14430, 10440, RCR123A(16340), 22650 Most 3.2V / 3.6V / 3.7V Lithium-ion Rechargeable Batteries
$13.99
From the Manufacture
FlePow smart Li-ion charger delivers advanced individual cell charging capabilities . Universal to recharge most 3.6V or 3.7V Lithium-ion rechargeable batteries like 18650, 18500, 14500, 14430, 10440, RCR123A(16340), 22650… 2 independent channels for 1 or 2 pieces li-ion batteries at a time, say goodbye to the hours when you can only charge batteries in pairs. What’s more, 2…
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…

Bavvo 6-cell Laptop Battery for Gateway 1533557 3UR18650F 2 QC MA1 4ur18650f-2-qcma1 4ur18650f-3-qc-ma1, 11.1V
Bavvo 6-cell Laptop Battery for Gateway 1533557 3UR18650F 2 QC MA1 4ur18650f-2-qcma1 4ur18650f-3-qc-ma1, 11.1V
$18.99
Trademark Bavvo products are marketed exclusively by Bavvo. OEM compatible! High capacity battery certified by CE and RoHS, This battery was tested and proven to match and/or exceed original specifications of Gateway products. Fit Machine Models: Gateway 106214 1533557 3UR18650F 2 QC MA1 4ur18650f-2-qcma1 4ur18650f-3-qc-ma1 6501097 6501117 6501130 6501142 6msgb aha63224614 aha63226064 b1425010g000…
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
$7.91
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. …

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)
$24.35


Incoming search terms:

  • 18650 battery from walmart
  • 18650 Battery Walmart
  • 18650 battery
  • Where to Buy 18650 Batteries
  • 18650 battery weight
  • 18560 ultrafire battery in stock
  • were to buy battery number 18650
  • what products have 18650 batteries
  • what store carries 18650 batteries
  • what store sells 18650 battery
  • what walmart products use 18650 battery
  • where can you buy 18650 batteries
  • where to buy authentic 18650 battery charger
  • tesf amps 18650 battery
  • stores that sell 18650 batteries
  • 18650 battery 3500mAh walmart
  • 18650 battery where to buy
  • 18650 rechargeable batteries
  • 18650 walmart
  • 18650 walmart in store