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Computers and Technology

How To Charge FrSky Transmitter NiMh Battery

In this article, we will look into how to charge FrSky NiMh battery and use it on your transmitter for some jolly good flying sessions or driving if you are into that as well. We have already discussed about the various FrSky radios in the market and how they work along with their reviews but we still haven’t got around to the part where we connect batteries into them and recharging those cells. In most cases, FrSky does not ship transmitters with batteries in them, so you would have to get a battery pack separately and will need to charge it .

Types of Batteries for your FrSky Transmitter
Since FrSky doesn’t usually provide batteries for their entry-level transmitters, you have to purchase a battery pack for your transmitter and you have a plethora of options to choose from – NiMh, LiPo, Li-ion, LiFe, Alkaline and much more but most of us would either purchase the dedicated battery from FrSky for your particular transmitter or just use an old LiPo or Li-ion pack we have laying around.

What I personally would do is to use the FrSky battery pack for best compatibility for the same and the second-best method for me is to repurpose an old LiPo lying around. Now if nothing else is available ill just go for standard AA rechargeable batteries.

Charging on FrSky QX7 Transmitter
The standard QX7 does not come with battery nor an inbuild charging circuit to charge your batteries inside the TX (but later versions do come with a charging connector on the side where you can connect your charger to and charge the battery without taking out the battery).

In normal conditions, you would be required to open the battery cover on your FrSky Transmitter and then take out the battery to charge it once it is depleted with a proper charger like shown below

Not only is this cumbersome but at the same time it takes away valuable time from your flying sessions (unless you have multiple battery packs available).

The other way would be to have LiPo or LiFe or even Li-ion batteries installed on your transmitter and use it while being plugged in. Usually, LiPo or LiFe batteries will have 2 or more connectors for charging and discharging. You can plug on into your transmitters input port and the other to the charger so you can use it while it’s charging. But this might not be advisable except when you really need to use the transmitter when the battery is too low.

This shows the FrSky FCX07 charger for QX series of transmitters. This will automatically charge and cut out the charging procedure when the battery is full and thus, will help you have a long-lasting battery. Another great use for this charger is that it has a status LED that lets you know the charging status and you can use any 12V power supply to power this. So an external 3s pack would be able to charge your internal battery 😉

FrSky X9D Plus

In the case of X9D Plus, the charging part is quite easy as the transmitter comes with an inbuilt charger and also a 6cell NiMH battery pack for you (from 2019 models, this is no longer the case) and it makes everything so much easier.

The transmitter also comes with an included power brick that lets you plug into the side of the FrSky X9D Plus transmitter to charge it. You can charge it while using it as well, which is even better.

The 6 cell NiMH battery that comes with the transmitter is rated for about 2200mah which doesn’t seem like a lot – that’s because it isn’t. The battery will last you a couple of continuous hours of usage which might be enough in most cases but in case you are someone who flies for hours at a stretch, you might want to pick up some bigger battery for your transmitter.  


In this article, we have seen how to charge FrSky NiMh battery for both the FrSky QX7 and the X9D Plus transmitters which happened to be the two most popular radios from FrSky & have seen the different types of batteries that can be used on your radios for better battery life etc. 

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