Why is the 18650 more powerful than a AA?

CelticCross74

Flashlight Enthusiast
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Messages
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Location
Fairfax Va
So in other words there is no replacement for displacement which is why 18650's are so much hotter than AA. Also have 2 pairs of Orbtronics 3600mah 18650's on the way cant wait to try em
 

CelticCross74

Flashlight Enthusiast
Joined
Aug 30, 2014
Messages
3,987
Location
Fairfax Va
Orbtronic 3600mah 18650 @ 13Wh

Introducing the longest lasting 3600mAh 18650 Li-ion 3.7V PROTECTED Orbtronic (Panasonic inside) rechargeable battery cell.
Ultra high capacity.
• PROTECTED 3600mAh 18650 Li-ion Orbtronic 3.7V rechargeable battery (Panasonic inside).
• Resettable Protection: Over-current (Activated at 7.5A-8A), Over-charge (Activated at 4.35V) - Over-discharge (Activated at 2.5V) - el. short circuit protection. Protection electronic circuit designed by Seiko. ICs made in Japan.
• Best battery for High Power flashlight users, or for anyone who is looking for the longest run time. Real capacity - The longest battery life you can find in USA today.
• Orbtronic 18650 battery is very safe to operate. This 18650 Li-ion protected cell will automatically cut off current flow if any of the following occur: Short circuit (dead short) - Extreme temperature, Abnormally high current, Over voltage, Overcharge, Overdischarge.
• Battery cell: Panasonic, Capacity (Ah): 3.6 Ah (3600mAh), Charging Voltage (V): 4.2 V, Energy (Wh): 13 Wh, Nominal Voltage (V): 3.6V - 3.7V, Weight (g): 47 g, Diameter (mm): 18.6 mm (+/- 0.03), Length (mm): 68.9 mm (+/- 0.03) -- Button Top [Positive+] made of Nickel (Ni) - Negative terminal made of Copper (Cu) for superior conductivity, minimum resistance, and maximum durability.

• Button top.
• Protected.


Specifications:



• Capacity (Ah): 3.6 Ah (3600mAh)
• Energy (Wh): 13 Wh
• Nominal Voltage (V): 3.6V - 3.7V
• Charging Voltage (V): 4.2 V
• Weight (g): 47 g
• Diameter (mm): 18.6 mm (+/- 0.03mm)
• Height (mm): 68.9 mm (+/- 0.03mm)
• Max. Discharge rate: 7A
• Chemical Composition: Li-ion (Lithium-Ion)
• Protection ICs: Made in Japan (Design by Seiko)
• Bare Cell: Made by Panasonic, Made in Japan
• Button Top: Yes
• External Resettable Protection: Yes


Protection:
• Overcharge (Activated at 4.35V)
• Overdischarge (Activated at 2.5V)
• Overcurrent (Activated at 7A-8A)

• Overheating, and dual short circuit protection (External, and Internal).



Important - Electronic cigarette owners: Protected 18650 battery cells are larger (in diameter, and length) and are not suitable for e-cig mods.
Powerful high drain 18650 battery cells (without external [PCB] electronic protection) made for e-cig mods are available on Orbtronic.com, and you are welcome to place your order.


Important:

- See more at: http://www.orbtronic.com/3600mah-18650-li-ion-orbtronic-panasonic-rechargeable-battery#.dpuf
Introducing the longest lasting 3600mAh 18650 Li-ion 3.7V PROTECTED Orbtronic (Panasonic inside) rechargeable battery cell.
Ultra high capacity.
• PROTECTED 3600mAh 18650 Li-ion Orbtronic 3.7V rechargeable battery (Panasonic inside).
• Resettable Protection: Over-current (Activated at 7.5A-8A), Over-charge (Activated at 4.35V) - Over-discharge (Activated at 2.5V) - el. short circuit protection. Protection electronic circuit designed by Seiko. ICs made in Japan.
• Best battery for High Power flashlight users, or for anyone who is looking for the longest run time. Real capacity - The longest battery life you can find in USA today.
• Orbtronic 18650 battery is very safe to operate. This 18650 Li-ion protected cell will automatically cut off current flow if any of the following occur: Short circuit (dead short) - Extreme temperature, Abnormally high current, Over voltage, Overcharge, Overdischarge.
• Battery cell: Panasonic, Capacity (Ah): 3.6 Ah (3600mAh), Charging Voltage (V): 4.2 V, Energy (Wh): 13 Wh, Nominal Voltage (V): 3.6V - 3.7V, Weight (g): 47 g, Diameter (mm): 18.6 mm (+/- 0.03), Length (mm): 68.9 mm (+/- 0.03) -- Button Top [Positive+] made of Nickel (Ni) - Negative terminal made of Copper (Cu) for superior conductivity, minimum resistance, and maximum durability.

• Button top.
• Protected.


Specifications:



• Capacity (Ah): 3.6 Ah (3600mAh)
• Energy (Wh): 13 Wh
• Nominal Voltage (V): 3.6V - 3.7V
• Charging Voltage (V): 4.2 V
• Weight (g): 47 g
• Diameter (mm): 18.6 mm (+/- 0.03mm)
• Height (mm): 68.9 mm (+/- 0.03mm)
• Max. Discharge rate: 7A
• Chemical Composition: Li-ion (Lithium-Ion)
• Protection ICs: Made in Japan (Design by Seiko)
• Bare Cell: Made by Panasonic, Made in Japan
• Button Top: Yes
• External Resettable Protection: Yes


Protection:
• Overcharge (Activated at 4.35V)
• Overdischarge (Activated at 2.5V)
• Overcurrent (Activated at 7A-8A)

• Overheating, and dual short circuit protection (External, and Internal).



Important - Electronic cigarette owners: Protected 18650 battery cells are larger (in diameter, and length) and are not suitable for e-cig mods.
Powerful high drain 18650 battery cells (without external [PCB] electronic protection) made for e-cig mods are available on Orbtronic.com, and you are welcome to place your order.


Important:

- See more at: http://www.orbtronic.com/3600mah-18650-li-ion-orbtronic-panasonic-rechargeable-battery#.dpuf
 

CelticCross74

Flashlight Enthusiast
Joined
Aug 30, 2014
Messages
3,987
Location
Fairfax Va
brb-3600-1.jpg
 

ChrisGarrett

Flashlight Enthusiast
Joined
Feb 2, 2012
Messages
5,651
Location
Miami, Florida
what is the code name of the original panasonic cell?

NCR18650G.

You won't find them listed on Panasonic-Industrial's 2014 data sheet for the Panasonic and Sanyo cylindrical li-ion batteries.

I think that they were a limited run, or prototype that then got dumped into the stream of commerce and picked up by a lucky few.

Chris
 

kelvinchu

Newly Enlightened
Joined
Sep 21, 2019
Messages
1
When comparing batteries it is more correct to compare energy (Wh) than capacity (mAh). Energy includes the voltage difference.

The US18650VTC4 cell is not a high capacity cell, you can get 18650 will 3400mAh, i.e. considerable more mAh than a AA battery, but again the mAh is not that interesting.

Lets look at the Wh (The reason for all the "about" is because Wh varies with load):
A 2500mAh eneloop has about 3Wh
A US18650VTC4 has about 7Wh
A 3400mAh 18650 has about 11Wh

Looking at these numbers it is easy to see the why it requires 3 to 4 AA cell to match a 18650 battery.

All Wh numbers are from my website.



I'm still very confused :( … So if I have a speaker that used 6x AA configured at 7.2v and let say each cell capacity at 2200mah. Now if I like to replace it with 4x 18650 at 7.4v also capacity of each cell also at 2200mah. First can the adapter charge the 18650 if I just connect in place of the AA? Second, would the 18650 pack last longer than the AA pack if any and why please? Thank you so much
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,713
Location
Copenhagen, Denmark
It is a old thread you have found.

I'm still very confused :( … So if I have a speaker that used 6x AA configured at 7.2v and let say each cell capacity at 2200mah. Now if I like to replace it with 4x 18650 at 7.4v also capacity of each cell also at 2200mah. First can the adapter charge the 18650 if I just connect in place of the AA? Second, would the 18650 pack last longer than the AA pack if any and why please? Thank you so much

With 4x186500 for 7.2 volt (6V to 8.4V depending on charge condition) you need to use 2S2P configuration, i.e. double voltage and capacity compared to a single cell, but lets look at the Wh it is easier:
6x2500mAh eneloop is 3Wh*6batteries -> 18Wh
4x2200mAh LiIon is 7Wh*4batteries -> 28Wh significantly more energy (Using more modern cells would get you 44Wh).

You cannot use a NiMH charger to charge LiIon batteries, that would not work.
The LiIon batteries would probably last longer, but it depends on the equipment. Some equipment would increase performance and power consumption with higher voltage, this would spoil the longer runtime in some degree.
 

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