Do 1.5v li-ion AA/AAA sized cells exist?
09-24-08, 12:42 AM
#1
Senior Member
Thread Starter
Join Date: May 2006
Location: North of the 49th Parallel (GPS grid soon)
Posts: 1,766
Bikes: MTB Peugoet Canyon (forgot the model), Nikishi? roadbike, MTB custom build,
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Do 1.5v li-ion AA/AAA sized cells exist?
Looking for rechargeable 1.5v AA/AAA (prefer AA) sized cells for colder temps yet able to recharge after the cell has drained.
I am aware lithium one time use cells are out there but I'm looking for a rechargeable solution. I also know of the 3.7v li-ions but such single cell voltages in series would fry the devices I have that probably max out at 3.5v (2 x AA).
I am aware lithium one time use cells are out there but I'm looking for a rechargeable solution. I also know of the 3.7v li-ions but such single cell voltages in series would fry the devices I have that probably max out at 3.5v (2 x AA).
09-24-08, 12:57 AM
#2
Senior Member
Join Date: Jul 2002
Posts: 6,956
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 6 Times
in
5 Posts
Like, super-cold temps? NiMH AAs work ok down to any temperature I can stand to ride in (I wimp out below 10°F, feet can't stay warm).
(no, I don't know of any such batteries
)
(no, I don't know of any such batteries
)
09-24-08, 02:52 PM
#4
Senior Member
Join Date: Jul 2007
Location: Sunnyvale, CA
Posts: 317
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Li-ion is totally different than NiMH/NiCad in a lot of ways. For one, the cell voltage is at least 2x NiMH/NiCad/Alkaline/etc. It's not like there's two cells there in the pack to get it to 3.7v, it's still a single cell.....
If you abuse 'em, they'll blow up in a fairly unpleasant fashion. Prolly better to just start over and either homebrew, totally convert, or buy Li-specific gear.
If you abuse 'em, they'll blow up in a fairly unpleasant fashion. Prolly better to just start over and either homebrew, totally convert, or buy Li-specific gear.
09-28-08, 09:12 AM
#5
Recreational rider
Join Date: Aug 2007
Location: Phoenix, AZ
Posts: 115
Bikes: 2007 Specialized Globe
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
According to this table lithium-ion batteries have about the same operating temperature range as NiMH batteries. NiCd provides greater low-temperature usability, but of course at roughly half the energy density as NiMH.
09-28-08, 02:07 PM
#6
Junior Member
Join Date: Oct 2006
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
14500 li-ion batteries are roughly the same size as AA. 10440 are about the size of AAA. As others have pointed out the voltages are quite a bit higher. The available current is also lower than high-end nimh. You wind up getting about the same amount of watts from either (2600ma * 1.2v = 3.120 watts vs 900ma * 3.7v = 3.330 watts). And you pay a lot more for them.
If your ni-mh batteries get cold, stick them in your pocket. Seems cheaper.
Here's a couple of examples:
https://www.dealextreme.com/details.dx/sku.3435
https://www.dealextreme.com/details.dx/sku.974
M
If your ni-mh batteries get cold, stick them in your pocket. Seems cheaper.
Here's a couple of examples:
https://www.dealextreme.com/details.dx/sku.3435
https://www.dealextreme.com/details.dx/sku.974
M
