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

Panasonic CGR18650CG Rechargeable 3.6V Li-ion 18650 Battery 2250mAh, package of 2, 3008x2
Panasonic CGR18650CG Rechargeable 3.6V Li-ion 18650 Battery 2250mAh, package of 2, 3008×2
$7.50
Rechargeable Lithium batteries are rapidly becoming a very economical way to lower the operating costs of Lithium-Powered flashlights. Feature 3.6V 18650 size Cylindrical Li-Ion Cell No memory effect and longer storage life than NiMH Batteries Lighter weight and higher energy density than any other rechargeable battery Perfect for building batteries for laptop and other portable power devices…
Feamos 10Pcs 18650 Battery 4x5 Cell Spacer Radiating Shell Pack Plastic Heat Holder New
Feamos 10Pcs 18650 Battery 4×5 Cell Spacer Radiating Shell Pack Plastic Heat Holder New
$9.39
Description: 100% brand new and high quality Material: ABS Color: Black Advantage: Radiating during high rate discharge. Makes your battery pack Solid and Reliable! Tips for building: This Listing is for 10pcs Spacer, could fit 10 x 18650 batteries. Every two 18650 battery cells needs 2 Spacers (one up / one down) Size Approx: 8*10*0.8cm/3.15″*3.94″*0.31″ Quantity: 10Pcs Note: Due to the differenc…
Farmunion 10PC 18650 Battery 4x5 Cell Spacer Radiating Shell Plastic Holder Bracket 18.4mm
Farmunion 10PC 18650 Battery 4×5 Cell Spacer Radiating Shell Plastic Holder Bracket 18.4mm
$12.85
Package included 10x lithium batteries Plastic holder(Battery not included! )…
50pcs 18650 Lithium Battery Double Holder Bracket for DIY Battery Pack
50pcs 18650 Lithium Battery Double Holder Bracket for DIY Battery Pack
$11.99
18650 cylindrical battery holder, fire retardant pc+pp+gp materials; Crack resistant edge with the slot, with the firm, It can accomodate various size; Battery installation hole diameter 18mm, 2-linked structure, Nickel plate vibration test can be conducted without attachment to any device. Suitable for all types of battery assembly including do it option. Please note, installation requires t…
2PcsX 18650 2200mAh 3.7V Rechargeable Lithium Battery with 1Pc Li-ion Battery Charger
2PcsX 18650 2200mAh 3.7V Rechargeable Lithium Battery with 1Pc Li-ion Battery Charger
$19.00
Battery Size: 18.0*65.0mm ; Max Constant Charging Current: 2200mA(1C) ;Max Constant Discharging Current: 4400mA(2C); Charger Input: AC 100v – 240V 50/60Hz; Output: DC 3.7V; Dimension: 10x 4 x 3.5cm (L*W*H) ; Weight: 72g ;…
uxcell Two Wire Spring Clip 3 x 3.7V 18650 Cell Battery Holder Box Black 3pcs
uxcell Two Wire Spring Clip 3 x 3.7V 18650 Cell Battery Holder Box Black 3pcs
$6.47
This battery box holder with wire connector, fit for 3 x 3.7 V 18650 size batteries.With spring clip design, you can easily to put the battery in it.Battery is not included here….
3Pcs Double Wire Rectangle 4 x 3.7V 18650 Battery Holder Case Cell Box
3Pcs Double Wire Rectangle 4 x 3.7V 18650 Battery Holder Case Cell Box
$7.96
    for 4 x 3.7V 18650 battery.    Please pay attention to the Specification Table before purchasing, make sure our product is right what you want.    Battery is not included here….
Svpro Intellicharge Lithium LCD Rechargeable Battery Charger,Universal Smart Car Wall for Li-ion/AA AAA 10440 14500 16340 17500 17650 18350 18500 22650
Svpro Intellicharge Lithium LCD Rechargeable Battery Charger,Universal Smart Car Wall for Li-ion/AA AAA 10440 14500 16340 17500 17650 18350 18500 22650

2pcs 18650 2500mah 20A discharge Samsung INR18650-25R li-ion power cell
2pcs 18650 2500mah 20A discharge Samsung INR18650-25R li-ion power cell
$9.28
1. Nominal discharge capacity : 2500mAh Charge: 1.25A, 4.20V,CCCV 100mA cut-off, Discharge: 0.2C, 2.5V discharge cut-off 2. Nominal voltage: 3.6V 3. Standard charge: CCCV, 1.25A, 4.20 ± 0.05 V, 100mA cut-off 4. Rapid charge: CCCV, 4A, 4.20 ± 0.05 V, 100mA cut-off 5. Charging time: Standard charge : 180min / 100mA cut-off Rapid charge: 60min (at 25 °C) / 100mA cut-off 6. Max. continuous discha…

Incoming search terms:

  • 18650 battery from walmart
  • 18650 Battery Walmart
  • 18650 battery