14500 Lion's

[tramcar trev]

These are AA sized Li-ion batteries.... Low self discharge and higher capacitiy than an AA Ni Mh... In my radio control box there are 8AA ni mh batteries and despite being "Proffessional - low discharge" ones they seem to self discharge quickly. One other thing I notice with them is the iMax B6AC charger refuses to charge them, keeps coming up with "Contact Broken" message.... I am thinking that I can replace the 8 nimh with 4 x 14500's will give me more than enough juice....

 

[ge_rik]

These are AA sized Li-ion batteries.... Low self discharge and higher capacitiy than an AA Ni Mh... In my radio control box there are 8AA ni mh batteries and despite being "Proffessional - low discharge" ones they seem to self discharge quickly. One other thing I notice with them is the iMax B6AC charger refuses to charge them, keeps coming up with "Contact Broken" message.... I am thinking that I can replace the 8 nimh with 4 x 14500's will give me more than enough juice....

Hi Trev
Was there supposed to be a link (or a pic)?

Rik

 

[gregh]

If your charger says 'contact broken' then maybe you have a diode in series with the charger???? You used the 'guts' from a hobbyking Tx didn't you? It has a diode in the charger circuit.

I have been using these Hobbyking 'Low self discharge' 2400 mAh, NiMH AA types for a couple of years. They really do not self-discharge! I have left them for months and they are still at 1.35V after charging to 1.40V. No problem with charging.

http://www.hobbyking.com/hobbyking/store/__25023__Turnigy_AA_LSD_2400mAh_Low_Self_Discharge_ready_to_use_.html

What is the mAh capacity of the Li-ions? Always sceptical, I don't reckon Lith batteries have much better energy density than these NiMH.

 

[tramcar trev]

Hi Trev
Was there supposed to be a link (or a pic)?

Rik

Yers there was sposed to be a link....
http://www.ebay.com.au/itm/4PCS-14500-Rechargeable-Li-ion-Battery-1200mAh-for-LED-Flashlight-Torch-Camera-/251615463831?pt=AU_Electronics_Batteries_Chargers&hash=item3a95734997
But I would buy the fake Ultrafire ones and then complain that they are fake and get a refund....

 

[tramcar trev]

If your charger says 'contact broken' then maybe you have a diode in series with the charger???? You used the 'guts' from a hobbyking Tx didn't you? It has a diode in the charger circuit.

I have been using these Hobbyking 'Low self discharge' 2400 mAh, NiMH AA types for a couple of years. They really do not self-discharge! I have left them for months and they are still at 1.35V after charging to 1.40V. No problem with charging.

http://www.hobbyking.com/hobbyking/store/__25023__Turnigy_AA_LSD_2400mAh_Low_Self_Discharge_ready_to_use_.html

What is the mAh capacity of the Li-ions? Always sceptical, I don't reckon Lith batteries have much better energy density than these NiMH.

Ahhhhh well yes I did, maybe I'll see if there is a diode and disconnect it, the doide would prevent feedback to the charger I imagine....

 

[tramcar trev]

http://www.hobbyking.com/hobbyking/store/__25023__Turnigy_AA_LSD_2400mAh_Low_Self_Discharge_ready_to_use_.html

They come at a good price too, $1.79 ea..... same thing at Jaycar is $4.95..... Only advantage the Lions have is that the voltage is 3.6 meaning you need fewer cells to give you the voltage you want saving space plus ofcourse my little scam to get the over rated Ultrafire batteries for free....

 

[GAP]

Ahhhhh well yes I did, maybe I'll see if there is a diode and disconnect it, the doide would prevent feedback to the charger I imagine....

Trev,

The diode is a surface mounted device on the board adjacent to the ext power plug.

The bloke across the road had exactly the same problem and we just put a jumper across the diode to short it out and all worked fine.

 

[tramcar trev]

Trev,

The diode is a surface mounted device on the board adjacent to the ext power plug.

The bloke across the road had exactly the same problem and we just put a jumper across the diode to short it out and all worked fine.

Sorted, if anyone else has a similar problem the diode is labled "D3" on the board on my Tx its next to the battery plug.... works like a charm now....