AA Batteries

[Rick-J]

What are the best AA Rechargeable batteries for an old KO transmitter. Some seem to drop voltage very quickly and my transmitter does not like low voltage. Any suggestions. Thanks

[VintageRacer]

Get some new hybrid nimh, their unused discharge rate is much lower and they retain about 80% of charge even after 12 months on the shelf (at least that's what is quoted). I find they last well in our transmitters. Most manufacturers have their own brand name (eneloop for example). I buy from 7dayshop.com who do their own brand version at a good price.

[JCJC]

These Vapex green instants are good, don't discharge to much when not in use: http://www.vapextech.co.uk/acatalog/High_Power_Consumer_Batteries.html#a20

but can you not find lipo ?

[Rick-J]

I have a 40 mhz Ko Esprit II it has two separate battery compartments 4x AA 8x AA in total. It has no connectors just normal AA connections so I dont think you can get a lipo?

[CrashBangWallop]

As the 8 usual 'dry' cells are 1.5v nominal = 12 volts as a pack and rechargeable AA cells are 1.2v nominal you can, if you can fit them in run with 9 AA rechargeable cells = 10.8 volts, this will stop your TX dropping out as a lot of modern TX's, Futaba 3VCS for example the low battery alarm sounds at 9.6 volts which is = to 8 nimh cells at nominal voltage.

Just dont go mad with trying to get the volts up too high in a 9 cell 10.8 volt rechargeable pack as this can cause damage - slow charge them and check the voltage before installing them - no more than say 12.5 volts max.

[Alan Reeves]

I have a 40 mhz Ko Esprit II it has two separate battery compartments 4x AA 8x AA in total. It has no connectors just normal AA connections so I dont think you can get a lipo?

You can dismantle it and remove the wires to the terminals so you can solder the + and - wire on each side to two seperate battery packs and recharge through the jack plug.

[Conrad]

Any low self discharge AA, they are usually around 2100mah in capacity. I highly recommend the Sanyo Eneloop's which I bought for about £14 delivered for 8 on amazon during the summer. They done almost a full six months of racing once a week without needing charged.

[mark christopher]

get these, job done http://www.vapextech.co.uk/acatalog/High_Power_Consumer_Batteries.html#a20

[rondoolaa]

http://www.component-shop.co.uk/html/aa.html#IN2500AA


http://www.component-shop.co.uk/html/low_self_discharge.html

[Neil Skull]

Team Orion AA Nimh. 2700 mah

http://www.modelsport.co.uk/orion-2700mah-aa-batteries-4-pcs-/rc-car-products/29954

:)

[JCJC]

or stick with good 'dry' batteries,
http://www.toolstation.com/shop/Electrical/Batteries/Long%20Life%20Alkaline%20Battery/d190/sd2450/p51998

would keep you going for a while.

[Rick-J]

Thanks for the replies. The problem I have is that if the batteries drop down to 10.4v then the range drops and I get interference at the top end of the track. Is this normal?