StratoLogger ..... one 3.7v LiPo ??

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Walldiver7

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Will the StratoLogger logic function using a Lipo 3.7v cell? Anyone tried this? I'll be using the Quest Q2G2 igniters for e-matches.
Thanks!
 
Power range is 4-16 Volts. A 3.7 LiPo will get slightly above 4 volts when fully charged but I'd go with a 2-3S battery to be safe. I've run SL100's with Turnigy LiPo's and they work great.
 
Walldiver7 said:
https://hobbyking.com/hobbyking/sto...2S_65_130C_Lipo_Pack_E_flite_Blade_130X_.html

Would this one work??
Click to expand...

Yeah that one would work great. You could even go smaller if you are pressed for space, the idle power draw on the altimeter is incredibly tiny. As long as you get one that can pull a couple of amps for the charges you should be set, Q2G2's have relatively low amp requirements. A word of advice - if you are ordering from Hobby King try to find a battery that is in stock in the USA warehouse, instead if the International warehouse if possible. The shipping is way faster/cheaper.
 
Lipos are great, I use them for my launch control battery and FE (fast electric) boats. One thing I would like to add if someone looks at this thread and hasn't used or isn't familiar with lipos is not to over charge them. Maximum charge is 4.2 volts per cell so a 2s would be at 8.4 volts. Also do not discharge them below 3.0 volts per cell or you run the risk of them being damaged. The best for charging lipos is to use a proper balance charger. Hobby king has some very inexpensive balance chargers for lipos that I would suggest to use if you go the way with Lipos.
 
COrocket said:
Yeah that one would work great. You could even go smaller if you are pressed for space, the idle power draw on the altimeter is incredibly tiny. As long as you get one that can pull a couple of amps for the charges you should be set, Q2G2's have relatively low amp requirements. A word of advice - if you are ordering from Hobby King try to find a battery that is in stock in the USA warehouse, instead if the International warehouse if possible. The shipping is way faster/cheaper.
Click to expand...

Hobby King... Yes, I just discovered that their shipping was incredibly HIGH! I will do as you suggest! Thanks!
 
ksm2001 said:
Lipos are great, I use them for my launch control battery and FE (fast electric) boats. One thing I would like to add if someone looks at this thread and hasn't used or isn't familiar with lipos is not to over charge them. Maximum charge is 4.2 volts per cell so a 2s would be at 8.4 volts. Also do not discharge them below 3.0 volts per cell or you run the risk of them being damaged. The best for charging lipos is to use a proper balance charger. Hobby king has some very inexpensive balance chargers for lipos that I would suggest to use if you go the way with Lipos.
Click to expand...

Have you a recomendation for the charger? I looked at a few, but I really don't know anything about them. Thanks!
 
Stewart said:
A good cheap balance charger for small capacity 2-3cell Lipo packs is this - https://hobbyking.com/hobbyking/sto...3S_Balance_Charger_Direct_110_240v_Input.html or for feild chargeing - https://hobbyking.com/hobbyking/store/__7637__Turnigy_balancer_Charger_2S_3S.html or this https://hobbyking.com/hobbyking/store/__14633__HobbyKing_E4_Balance_Charger_.html (I have and use this and the mains powered charger mentioned first, both work great)
Click to expand...

I would personaly go with the third choice charger, https://hobbyking.com/hobbyking/store/__14633__HobbyKing_E4_Balance_Charger_.html
The batteries we are talking about above are below 1 amp, when charging these small batteries I would suggest to charge them no more than at a rate of 1C, this means that a 160 mAh lipo would be charged at a rate of .160 amps, or the 0.1 amp setting. you will get the longest life out of these batteries if you can stay in the 1C rule of charging.

This looks to be a very good charger also and gives you more options and a digital screen so you know whats going on. https://hobbyking.com/hobbyking/sto...m_Polymer_Battery_Charger_USA_Warehouse_.html it also will allow you to charge your batteries to a storage charge of around 3.85 volts per cell to get the longest life out of your lipos if they are not used over an extended period of time.
 
ksm2001 said:
I would personaly go with the third choice charger, https://hobbyking.com/hobbyking/store/__14633__HobbyKing_E4_Balance_Charger_.html
The batteries we are talking about above are below 1 amp, when charging these small batteries I would suggest to charge them no more than at a rate of 1C, this means that a 160 mAh lipo would be charged at a rate of .160 amps, or the 0.1 amp setting. you will get the longest life out of these batteries if you can stay in the 1C rule of charging.

This looks to be a very good charger also and gives you more options and a digital screen so you know whats going on. https://hobbyking.com/hobbyking/sto...m_Polymer_Battery_Charger_USA_Warehouse_.html it also will allow you to charge your batteries to a storage charge of around 3.85 volts per cell to get the longest life out of your lipos if they are not used over an extended period of time.
Click to expand...


Thanks for the help!
 
Grimracer said:
I use the little 200mah one of these.

https://www.lifesourcebatteries.com/

I get a good quality Deans and 6.6 volts. And the safety of a LIFE.

Grim
Click to expand...

Those look great, I never though of LiFe batteries for this, thanks.

Also the nice part with many of the chargers out there that charge Lithium Polymer(lipo) will also charge the LiFe batteries.

qquake, the 2 different sets of wires coming out of the batteries are, the heavy gauge set are the main power leads, the small set are balance plug wires that go into your chargers balance port so the charger can monitor each cell independantly when charging.
 
Last edited:
Hey guys,
I'm also interested in using lipo's.
One lipo, where I now use a 9V. alkaline.
If a stratologger is good up to 16V.
Why do you recommend a 2s lipo????
Why not a 3s. 11.1V??????
To much voltage for the Q2G2's???????
Teddy
 
Stewart said:
These are what i use with my stratologer https://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=23135 also get jst plug sets for conecting the battery and charge leads(at least one) https://hobbyking.com/hobbyking/store/__9682__Male_JST_battery_pigtail_10cm_length_10pcs_bag_.html and https://hobbyking.com/hobbyking/store/__9683__Female_JST_battery_pigtail_12cm_length_10pcs_bag_.html
Click to expand...

This battery shows a max bust discharge rate of 40C, which according to the website's table equates to 200,000 miliamps, or 200 amps. Is that correct? If so, seems like that's way too high for our uses.
 
Viperfixr said:
This battery shows a max bust discharge rate of 40C, which according to the website's table equates to 200,000 miliamps, or 200 amps. Is that correct? If so, seems like that's way too high for our uses.
Click to expand...

According to this website, the discharge rate (40c in this case) is multiplied by the capacity (180mah). This particular battery would be capable of a burst of 7200mah (40 x 180) or 7.2 amps. But remember, a battery only gives what is drawn from it, up to its maximum discharge rate. For instance, if an ignitor requires 3 amps, that's what the battery will provide.
 
Viperfixr said:
This battery shows a max bust discharge rate of 40C, which according to the website's table equates to 200,000 miliamps, or 200 amps. Is that correct? If so, seems like that's way too high for our uses.
Click to expand...

To get your amp rating for a Lipo use the battery you have which is .180A x 40C = 7.2A will be your maximum draw rate.

Ted, you could use a small 3s lipo but it's not the voltage that will fire the igniter, it's the amperage. These small 2S Lipo's will produce more than enough amperage to fire an E Match or Q2G2 ignitors.
 
Last edited:
Grimracer said:
I use the little 200mah one of these.

https://www.lifesourcebatteries.com/

I get a good quality Deans and 6.6 volts. And the safety of a LIFE.

Grim
Click to expand...
The primary advantage of the LiFe battery is that you tend to get more cycles out of the battery as compared with LPo or Li-Ion batteries.

The adds on the website for the batteries are a bit deceptive because they are comparing the performance of the LiFe battery against NiMH batteries, not LiPo batteries.

LiPo batteries put out higher current, and more power than LiFe batteries because the voltage is higher. LiFe batteries require a lower voltage than LiPo batteries so a plain vanilla LiPo charger will overcharge a LiFe battery. There are many smart chargers that will charge Li-Po, LiFe, PbAc and NiMh batteries however.

Both are good batteries so I wouldn't spend a ton more money for the LiFe batteries than a LiPo as both are adequate for hobby use, but for high current situations I still would go with Li-Po at present.

Bob
 
The extra plug is a balance plug.
When you charge a lipo on whats termed a computer charger
the charger has access to each cell of the battery individually.
Thats why they're called balance chargers.
All of the horror stories you hear about lipo's exploding into flames are true.
Thats from charging them improperly.
They must be charged on a charger meant for them.
Teddy
 
If you don't have a 12volt power supply you can use an old computer power supply which will give you constant 12 volts. You can also use a 12 volt vehical battery.
 
ksm2001 said:
If you don't have a 12volt power supply you can use an old computer power supply which will give you constant 12 volts. You can also use a 12 volt vehical battery.
Click to expand...

I've been playing around with using a 7ah SLA battery to power the charger. Seems to be working so far.
 
Stewart said:
These are what i use with my stratologer https://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=23135 also get jst plug sets for conecting the battery and charge leads(at least one) https://hobbyking.com/hobbyking/store/__9682__Male_JST_battery_pigtail_10cm_length_10pcs_bag_.html and https://hobbyking.com/hobbyking/store/__9683__Female_JST_battery_pigtail_12cm_length_10pcs_bag_.html
Click to expand...

Thank you! I'd been through trying alkaline 9V batteries (too big and bulky) and stacks of SR44s (I couldn't fit six of them in a Radio Shack N holder, my home-built holder was too big and bulky, and I saw a huge voltage hit when it fired an igniter), and these worked great. Small, lightweight, no voltage fluctuation at all when the igniters fired, a heck of a lot cheaper than the silver oxide. I also bought https://hobbyking.com/hobbyking/sto...r_Balancer_USA_Warehouse_.html?strSearch=HKC6 to go with it (I had to buy some banana plugs to connect one of the JST pigtails above to the charger).

Now if only I hadn't used too much black powder, so my L2 certification attempt hadn't come down in three pieces...
 

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