The 1S 3.7V 200 mAh E-flite 30C LiPo batteries are designed for use with small scale RC helicopters such as Blade mCPX and are the original batteries made by E-fliete for that particular model, though they are also compatible with other similar models such as WLtoys v922 or Turnigy FBL100 and others. And while these batteries are quite Ok for stock batteries for these RC helicopters the question is if they are able to meet their specifications and that is exactly what we are going to check now.

Official Battery Specifications:

– Capacity: 200 mAh
– Voltage: 1S1P / 1 Cell / 3.7V
– Discharge: 30C Constant
– Discharge Plug: E-Flight Ultra Micro


We have started the tests with a 1C discharge rate (0.2A) for the 1S 3.7V 200 mAh E-flite 30C LiPo battery and we’ve managed to get 214 mAh as a maximum capacity, or a bit over the manufacturer rating for this battery. Increasing the constant current load further to 5C, 10C and even 15C and the battery still manages to provide slightly more capacity than it is rated at. At 20C discharge it is still handing quite well, at 25C is still manages to offer decent capacity though going on the low side and at 30C, the ratting that for constant current discharge that it can handle it fails. So the real rating should be more like 20C-25C constant current and not 30C, nevertheless the mCPx helicopter still works quite well it that battery as it probably does not need 6A load. You might consider going for alternative batteries with slightly higher capacity and a bit lower constant current discharge rating in order to get more flight time.

The performance of the 1S 3.7V 200 mAh E-flite 30C LiPo battery in our tests:

– 214 mAh at 0.2A load (1C)
– 206 mAh at 1.0A load (5C)
– 203 mAh at 2.0A load (10C)
– 201 mAh at 3.0A load (15C)
– 187 mAh at 4.0A load (20C)
– 120 mAh at 5.0A load (25C)
– 7 mAh at 6.0A load (30C)


The 1.2V AA 3000 mAh BTY NiMH batteries are something that you may find in a lot of Chinese online stores as well as on eBay and what you will notice for sure with these batteries is that they are being sold very cheap for 3000 mAh capacity. These rechargeable AA batteries supposedly offer the very high capacity of 3000 mAh and the considering their very cheap price should raise an alarm, meaning that the capacity rating is most likely lower than advertised. It is always a wise idea to avoid getting such batteries, but we got a pack of four in order to be able to test them and see what is the actual capacity that these batteries are providing and how much it differs from the advertised 3000 mAh. We were prepared for nothing more than half the advertised capacity, but going through a Break-In mode on the MAHA C9000 Charger/Analyzer we were not prepared for such a disappointment. On the photo above you can see the minimum and maximum measured capacity of the pack of four batteries and you will get why we were so disappointed. In fact what we got as available capacity was as follows: 306 mAh, 334 mAh, 337 mAh and 373 mAh and that is from batteries that are being advertised as being able to provide 3000 mAh capacity, not worth buying these regardless of the price, hell they are not worth even if somebody gives them to you for free.

Avoid buying 1.2V AA 3000 mAh BTY NiMH batteries, they are really not worth it!!!


The 9V Energizer Alkaline batteries we are testing here are the standard Alkaline batteries from Energizer that should be the same as the 9V Industrial model that we have already tested, or at least this is what the official datasheets are suggesting giving pretty much the same specs for both types of batteries. The expiration date for this battery is written as 2018 and the production date is 08-2013 with a 5 year shelf life given by Energizer, unfortunately since the production and expiration date for the 9V Energizer Industrial battery we have tested already is way too different as this is a very fresh battery we cannot make direct comparison. This however gives the chance to see how fast do these batteries self discharge over time considering that the 9V Alkalines are with pretty low capacity already compared to AAA and AA size Alkaline batteries for example.


In order to test the capacity of the 9V Energizer Alkaline batteries we are using a constant current discharge rate of 0.05A (50 miliampers) and we have managed to get 456 mAh. Excellent result and the reason we are getting such a high capacity is most likely that the battery has been produced just about three months ago, as for example the 9V Energizer Industrial Alkaline battery has managed to give us 380 mAh, but with a production date almost a year and a half before this one. So what you absolutely must do for 9V Alkaline batteries is to get them as fresh as possible in order to ensure that you will be getting really the maximum capacity out of them. So far this fresh battery from Energizer has provided the highest capacity in our tests for 9V Alkaline batteries, but as we’ve seen from the 9V Energizer Industrial Alkaline battery tests these batteries do perform very well even if you do not get them with a very recent production date.

The performance of the 9V Energizer Alkaline batteries in our tests:

– 456 mAh at 0.05A load

– 3.418 Wh at 0.05A load

To download a datasheet with the manufacturer’s battery specifications