ZIPPY 240mAh 20C single cell

 mig.21 100 points

This battery does not have overcharge protection, u can only charge with USB after being soldered in the chopper. The size is OK.

 Meldrac 7 points

That's fine, I only use the usb to charge anyway. My transmitter batteries last longer and i don't trust using the transmitter to charge in case the batteries are low.

 HellyFlyer 1249 points

I couldnot find the exact battery type for the micro but if you have the orignal then just match the diamensions of the 2 cells and see if it will fit the battery compartment and the maheven if it's slightly higher then it's ok

 Meldrac 7 points

The dimensions are almost the same and measurements confirm there is enough room for the battery.

 HellyFlyer 1249 points

No this will not work as the Micro requires a 2cell battery

 HellyFlyer 1249 points

I am not sure if this is the right place to ask this question, if you wish to know if this battery will work on the skymaster then yes it will.

 Artur Filipe 15 points

I´m not sure about it´s chemistry. But I use them in a 2S configuration on my micro cars and they have a good discharge curve, holding voltage until the end and not saging lower when I hit the trhottle.

 mathieulj 1 points

The thing is here I plan on using them potted in epoxy and have my own circuit connected handling charge, discharge and protection. I would like to know the chemistry so i can have a decent approximation of the cut-off voltage I need in order to retain a certain capacity in the battery (for longevity). For example, with some types you can approximate that at 3.5V you'll still have 20% left in the battery. If these batteries were the same, I could take that value as my safety cutoff to stop the discharge.

 Artur Filipe 15 points

You can set the cut-off 3,2v safelly. Is the same I use and no damaged cells yet, even under heavy use with motor getting hot and the cells getting just warn. thanks!

 HellyFlyer 1249 points

This one is a Li-Cobalt battery

 WTWUK 1387 points

Potted in epoxy? Could there be any potential problem with doing that should the lipo 'puff' and/or decide to destroy itself as they occasionally do? Would the epoxy not permit the heat generated during use to dissipate as it should?

 mathieulj 1 points

*WTWUK "Could there be any potential problem with doing that should the lipo 'puff' and/or decide to destroy itself as they occasionally do?" That is exactly why I need to make absolutely sure it will never go into zones of operation that will stress the battery. This is not your standard RC application. I use relatively low currents, 0.1C discharge and 0.1-0.7C charge and I have a purpose built circuit that will charge to a max of 4.15V and cutoff the battery at 3.6V until the charger is present again. *WTWUK "Would the epoxy not permit the heat generated during use to dissipate as it should?" No, the heat will not be carried away as easily as if the battery was in free air. Hence I have to be really careful with heat management (ex. lowering charge/discharge currents).

 HellyFlyer 1249 points

very good perfomrance awsome little battery very powerfull does not come with any connectors though.

 gouldie 401 points

yes you have to solder your own wires onto the contacts.

 Max 3 points

Thanks

 HellyFlyer 1249 points

already answered

 gouldie 401 points

iv always charged mine at 1c. never trusted turnigys saying of 2c. charge one of my other turnigys before at the stated 2c and the pack come of the charger hot. if your getting a bunch of these you can always hook them up in parrallel on the charger so you can charge them all at the same time

 LORIOT 7 points

Pratique pour les petits helicos ou autres, par contre il faut mieux les charger en 1C pour la longevite de vie de la batterie.

 HellyFlyer 1249 points

this battery can only be charged on 0.240 amps so when charging from a good charger select 0.2 and not more than that.

 rbyrne420 2 points

The less demand you put on a lipo the longer it will last. Same goes for charging, the slower the better.

 juanjo2 15 points

Hi, you wil visit this forum threas at post #13, they explain with images the keychains camera mod from put in a 200mah lipo cell, that fit perfect inside the www.link look

 LORIOT 7 points

Pratique pour les petits helicos ou autres, par contre il faut mieux les charger en 1C pour la longevite de vie de la batterie.

 HellyFlyer 1249 points

thanks Bill

 aJS32 281 points

Hi.
If you join them in series, you will get 3S1P bat with 11.1V and 720mAmps: Charge 1C=0.7A.
If you join them in parallel, you will get 1S3P bat with 3.7V and 2160mAmps: teoretically 1C=2A but you have to monitor each cell not to overcharge it.
Regards

 AvistarAddict 26 points

Not only is that advice wrong, it's dangerous. 3 240 mAh batteries in parallel will give you one battery with a nominal voltage of 3.7 and a capacity of 720 mAh. A 1C charge would be 0.7 amps. 3 of these cells in series would give you a pack voltage of 11.1 with a capacity of 240 mAh. A 1C charge for that pack would be 0.24 amps.

 pr0fab 440 points

Combining the capacity of cells in parallel to their totals. (700mAh 700mAh = 1.4 Ah) Combining the cells in this way increase the working time of the propulsion system.

 Roy_T 134 points

Based on my experience with 6 of such lipos, the capacity varies. My advice is to charge them individually and then connect them in parallel so as to 1) avoid overcharging the lipos and 2) give you flexibility to change the weaker/damage lipo.

 Miguel 2 points

Hi, in my experience this cells should be charged at 1C=0.2A so if you have 3 in parallel charge them at 0.6A, if you have 3 in series charge them ay 0.2A Remember in parallel the voltage is equal in all the cells but the current is the current of 1 cell multiplied by the number of cells, in series the current is equal in every cell but the voltage of the full package is the voltage of 1 cell multiplied by the numer of cells

 Knifenslow 21 points

In parallel you get the same voltage, but 3 times the capacity so the pack can be charged at 3 times the current you would use for a single cell but AT THE SAME VOLTAGE as for a single cell.

 Gerben 520 points

aJS32, sorry that is wrong. You are basing calculation on 720mAh cells, however the question is on 240mAh cells. AvistartAddict is right, follow his advice. Gerben

 HellyFlyer 1249 points

you should select 0.7 in your charger while charging it

 rbyrne420 2 points

I have 3 of these same lipo cells, I would recommend charging in parallel and i would charge them at .6mah. I say .6mah because the cells hold closer to 190mah on a full cycle. with all three cells charging on a parallel circut you would follow recommend 1c charging for all cells.

 Coune 1 points

I mean with 2 of this cell, how can I mount in serie to make a baterry for my Micro cessna ?

 Jabird 285 points

you need to buy whichever connector you wish to use. then solder to - on one cell to the other then solder connector to remaining and - tab.

 aJS32 281 points

I would suggest some very small connector. You can use even a servo wire. To put 2 batteries into series, you have to solder of the first battery to the - of the second battery and connector to the remaining - on the first and on the second. Additionally you can add a balancer wire. Thats it. Regards

 Roy_T 134 points

1. Stick 2 cells back to back (using CA) and solder the positive terminal (cell 1) with the negative terminal (cell 2) to form the center lead. You might want to use scotch tape to keep the two open terminals from contact.

2. Next, cut the JST-XH 2S Wire Extension (idProduct=9735) into two halves.

3. Solder the three leads of the Lipo battery to the male end of the JST-XH to form the charging connector.

4 Finally, solder the two extreme wires of the female half of the JST-XH 2S Wire E

 Coune 1 points

Thank you for your reply guys !

 Croupier 91 points

you can solder the battery directly on the RX and put a switch on it

 Miguel 2 points

you need to solder the of one cell to the - of the other, then solder this plug to the remaining pads, black to - and red to www.link

 HellyFlyer 1249 points

Depends on what you want to connect it with , this battery does not come with any connectors

 rbyrne420 2 points

I find that soldering balancing connectors of your favorite brand offers plenty of connection and light weight, all for about .66 cents

 AvistarAddict 26 points

You can't test 4 batteries per day? Had you read the reviews you'd have known that these batteries capacity is closer to 200 than 240.

 Pehr 1 points

Hello, The Zippy 240mah can deliver 199mah at best. When talking weight and performance I would recommend Hyperion CX UM 160mah, it deliver 100. Please read the full review for more information. www.link

 Matthew 3 points

I had no problems with the 4 I ordered. Perhaps abused in shipping?

 martin555 31 points

mine PUFFED too!!

 HackerA60 221 points

The first 100 I used delivered 240mAh without problems. The next 110 were really bad (160mAh). It's for sure a bad batch and HC doesn't recognize that. *AvistarAddict: I've better things to do than test bad batteries that cost too much. I found another source for a 0.99$ battery that delivers 285mAh.

 smplmn 36 points

I have to disagree.I bought 8 of them and made a 7.4 v packand they work great.Happy am I

 all4smallrc 12 points

That's odd. I've had great experience with these. I love them.

 __gabo 7 points

you're right!

 Trevor 314 points

You can solder these batteries to a connector. Or as a multi cell battery.

 Julius 51 points

Yes, you can. Just make sure there's not too much tension on the tabs* tape your wires to the battery.

 condor11 20 points

Yep, you can solder no prob. To be extra sure you won't ruin the battery use some locking tweezers to grab the end so the heat will dissipate better.

 Flik_Flyer 23 points

Hello, I have 2 of these little batteries, to built a 2S pack, I've soldred them with no problems. Charging and ballance performs OK after all. I've used a 70W solder Iron.

 ransideous 66 points

soldering is fine, just dont let -/neg touch /pos www.link E V E R

 ransideous 66 points

u can, i have

 Bowerz 47 points

Designed to solder to wire or other tabs to make your own packs.

 slimage 69 points

solder away

 Kostas 72 points

Yes you can solder, but you must be careful not to use a high wattage soldering iron.

 Kostas 72 points

Yes you can, low wattage soldering iron and use an alligator clip on the tab for heat sink. Be careful not to short it out, it could damage the cell.

 stephanefsx 41 points

sure you can - lipo's withstand these temps well

 Samuel 18 points

Yes you can. Just don't solder too long... make thinks quickly

 Matthew 3 points

They actually solder very easily! Make sure the iron is hot, the tabs are very thin and won't take the heat long without losing strength.

 martin555 31 points

I bought about 10 of these, some puffed. why? bad elelctic circuits in my micro heli or bad charging/discharging?

 slimage 69 points

yes just rosin core solder

 ransideous 66 points

soldering is fine, just dont let -/neg touch /pos www.link E V E R

 lkt01071 22 points

I soldered them, making 2 packs as 2S1P lipo battery, no performance drop whatsoever.

 ransideous 66 points

u can, i have

 Moonriseflyer 48 points

If you use a good soldering iron and be quick there will be no problems, I have just assembled 4 packs without any problems.

 stephanefsx 41 points

sure you can - lipo's withstand these temps well

 Matthew 3 points

They actually solder very easily! Make sure the iron is hot, the tabs are very thin and won't take the heat long without losing strength.

 Julius 51 points

These can be charged at 1C, which means a charging current of 0,240A.

 Letatel 363 points

2C, I mean. But I will not charge this cell with rate 1C

 smplmn 36 points

Hello bluefisherking . i charge mine at .3 amps have had no problems

 condor11 20 points

Best is 1C, 2C can be done too, just be sure to watch the cell, don't leave it unattended.

 slimage 69 points

.2 amps

 Flik_Flyer 23 points

I've chrged at 0.5C rate wiyh no problem but next I will do at 1C.

 ransideous 66 points

unless other wise advertised or specified, lipos charge at 1c.... one times the capacity of the bat.....the mah rating

 Bowerz 47 points

I charge a .3amps which will give just over a 1c charge. They come off the charger cool as a cucumber!

 Kostas 72 points

I charge them at 1C to 2C, but I found that the capacity is lacking

 Kostas 72 points

I charge them at 300mA they seem to hold up OK.

 Nactan 14 points

Try charging at .2 or .3 amps.

 Samuel 18 points

I guess 1C...

 Matthew 3 points

.24A max by design. I charged mine at .5 with no trouble, but I can't guarantee they will all work.

 KS photo 137 points

You make your own tabs. There is a link somewhere to the JST connectors with bare wires.
2 cell, negative lipo battery lead is black lead on balance connector you make.
First connection on the series circuit (where you connect the plus and minus terminal in a multi cell pack) is the first positive lead for your balance connector, and every time you add a cell in series the connection becomes the next positive balance connector.
2 cell : Three total leads, one negative (black) and two positive (red and other colour not black).
3 cell: Four total leads, one negative and three posite leads.
These can be made up from a 24 awg wire, depending on the Ampacity of your pack.
The plus minus bat leads that go to your ESC should be of a wire gauge appropriate for the load being connected.

 slimage 69 points

its 1 cell dude what other cells are there to balance?

 stephanefsx 41 points

aren't needed as this is a single cell if you want to make a pack with multiple cells look up on how to solder them

 Matthew 3 points

You don't need to balance individual cells or parallel cells. If you are making a series cell pack, then you will unfortunately have to make your own balancer plug.

 TekRC 21 points

Hobby King has them: www.link JST-XH Wire Extension (10cm)

Just cut off the male end leaving the amount of lead wire you need and solder to the li-po pack tabs using the correct polarity. Cover exposed wire and tabs with heat shrink tubing. Save the female end for future use.

 Johannes Falk 20 points

how do I determen the correct polarity?

 Johannes Falk 20 points

red lead connected to the - and black lead to the +?

 Jackedman 43 points

wouldn't it be red to the + and black to the -

 TrevJonez 570 points

a good way to figure this out is put your volt meter on it and if the voltage reads negative you have it backwards!

 Cristian 20 points

Convert everything to JST connectors* will do a great job

 slimage 69 points

yank the black plastic end off one of your bad original battery then you can make a adapter with the micro gold bullets they sell here

 Kostas 72 points

www.link Here is the location for the connectors. You will have to do some soldering etc...

 sadkingbilly 118 points

They come like in the picture above, with two steel tabs. No need for special training, if you are insecure about soldering lipo cells put a small wet (moist!) towel over the lipo and ONLY the tab you're soldering currently (to prevent shortcut!). First put on a small amount of soldering tin, tin the wire too and bring together, put the iron on the wire.. Finished :o)

Remember, when soldering 2S packs or above, you'll need balance tabs too or you will get unbalanced packs with a short lifespan!

 SDG666 78 points

What to you mean by balance tabs?

 condor11 20 points

It's safe to solder, just be sure to use low power soldering iron and don't accidentally short the leads.

 willem h 7 points

yes
solder the pwer lines on to the end of the small
strips(as far as possible from the lipo it self)
now you can role each powerline so it becomes a nice compacked join.
DO NOT FORGET TO INSULATE THE JOINES!!

 stephanefsx 41 points

video www.link

 Matthew 3 points

Only solder to the tabs coming out of the cells. Make sure the iron is hot before you start. Just solder them like normal, but remember, the tab is not strong, so don't pull on it to test the solder.

 Vitalka 72 points

No need for special solder, they have steel tabs.

 Trevor 314 points

Hudy solder work best.

 Matthew 3 points

Nope, rosin core silver solder is the best to use because of it conductivity, but any electrical solder will work.

 maukabud 408 points

I like to add a smidge of flux also...better, faster heat transfer. :)

 magnusEl 1214 points

No it`s not. This is smaller, but thicker.
HXT cell is 12-20C but this is rated only 20C...? Is that continuys?

 ROGIS 84 points

Que voltage ofrece? 3.7v? Seria correcta apta esta bateria para un "micro helicoptero GYRO 6020-1"? Ya use las bateria de 350mAh pero las queme en un vuelo

 jpinn 209 points

Please restock these cells. They are the perfect fit for the pz sukhoi and other micro planes.