Common Sense RC (4 Pack) Lectron Pro 3.7V 180mAh 45C Lipo Battery with Micro Connector for Blade mCX, mCX2, mSR, mSR X, Nano QX, & UMX AS3Xtr

Although not made for it, I bought these for my Blade-MCX2 Helicopter. They are a little longer than the factory battery, but work perfectly & give about two to three minutes (roughly) more run time. I've had them for several weeks or more now & they are still going strong. I'd buy more of these if I wanted even more spare batteries, but five total (4 of these plus the stock battery) are enough! The optional, four-port, E-Flight battery charger also works good with these batteries. No Complaints, but I did glue the edges ("side-flaps") of each battery down (to make installing them quicker & easier), using hobby grade super-glue. A tiny drop on each side was all I needed. The batteries came with some velcro pieces that I cut up and used as "stops" to keep the helicopter balanced. I put one short piece on the top & bottom of each battery. I have them set so that the battery goes in & just touches the back of the front body work (opening). This seems to keep the helicopter well balanced with these slightly longer (about an eighth of an inch longer) batteries. The electrical connector matches perfectly.

Use these in my UMX planes/heli's. Work good at first, but after a year they are ok in planes, but can't handle the Blade Nano S3. Not sure any of these small 1s last longer than a year tho.. I'll keep buying these, worth it for the price.

One of the plugs on one of the batteries was a little iffy and wouldn't completely connect, but mostly only mattered when I "landed" a little hard as it would pop off. After a few runs it seems to have adjusted itself and seats ok now.These batteries are performing great so far (maybe ten flights each so far) and charge easy in my Hitec X4 Micro Ac/dc 1-cell Lipo Charger (44212). They are *slightly* heavier and larger than the stock battery, but not enough to feel and since the quad has a gyro it effectively auto-corrects for any imbalance that the different shape might cause.

When using these with the Blade Nano QX FPV I was able to get some additional flight time over the stock E-flite 150 mAh battery that came with it. Probably only about a minute extra, but when flight times are already as short as they are any additional time is good. They are almost the exact same size even though they hold a larger charge and fit as well as the stock one does. When flying them in the standard non FPV Nano QX they provided about two extra minutes of flight time. I would recommend them.

I used to buy common sense RC batteries a lot - maybe 5-7 years ago. They were a great company and I loved their products. Good customer service too. These batteries though - not performing. If I take it really easy, I can get 3 or 4 minute flights. I also bought the big brother B01MU32BQX 220 mAh version I get maybe 4-5 minutes on the bigger ones. The flights on these are also more sluggish, less responsive compared to other brands of batteries. They act like a 20 C lipo at best. I've bought 4 different brands of lipos this month, and by far, the Tattu's have performed the best. Cheaper too. The Tattu 220 mAh gets me 7 min flights and will actually discharge 80% before the quad LVC kicks in. For some reason, the Common Sense packs will only be about 60% discharged when the LVC activates. Almost like you would expect on a pack that had been run hard for 100 cycles and was nearing the end of its life or something. I dunno... maybe I got a bad batch. Twice.

All 4 packs worked like a charm on my Nano QX fpv. Follow the directions (charge batteries before use) and you shouldn't have any problems. Haven't done a flight time comparison to the Blade battery. But I'm having fun since I have 5 batteries to fly with and rotate in between. Will buy more once these start losing it's charge capabilities.Update: after about 15-20 cycles, I'm noticing shorter run time. Still charges (using the Blade USB charger) and works. Also, I used the velcro strips included with the batteries to help keep the batteries snugly in the QX. Doing so, created too much stress on the black plastic caps. 2 have come unglued from pulling them out of the quad. Be extra careful not to pull on these caps. Push them out from the backside.Update #2: ordered another set of 4. Recharged and did a comparison against the original Blade 150mAh 25c battery. I noticed a huge difference in performance. With the Lectrons, the Nano QX FPV lacks the power draw, to recover on a sharp turn+yaw. With the Blade battery, it does great at sharp turns and produces more power to recover. Excuse my lack of proper terminology. I'm new to this. I'm my opinion, these are good for easy, calm flights. If you're looking to push the Nano, these will not do the Nano justice. I'll be ordering the Blade batteries once these die.Update #3: won't be buying anymore of these. ALL 8 batteries are virtually out of juice after only about 15+/- cycles. Proper charging on Eflight 4 port charger with the Eflite AC adapter. The Nano QX automatically immobilizes your quad before it drains the battery completely, so I know I haven't pushed the batteries beyond their minimum discharge. The most these are capable of doing is lift the Nano around the living room once and descends.... yes, on ALL 8 Electrons! Changed 5-stars to 1 star. Don't buy.