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Old 11-09-2019, 03:22 PM
airboss/oc is offline
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desert racer
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AR Booma RC has an onboard "smart charging" set-up with multiple chemistry (life,lipo,lion) but you must use their smart lipos and life batts. very nice system never remove the batts. the whole system just needs 12V input
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Old 11-09-2019, 11:08 PM
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Originally Posted by camss69 View Post
If itís been around longer than a decade, itís old school in my book lol!
Today's LiIon batteries are very different than the ones produced just a few years back so they are clearly not old school. Technology has changed the reduced working voltage from what was common with the old LiIon batteries to where they are now the same as LiPo batteries. Add to that they now offer a higher "C" rating than what was available before. They are a far better product than they once were.

Thank the power tool industry, communication equipment requirements and even e cigarettes for this as modern LiIon batteries are used everywhere these days with great results. Even the Tesla cars use them.

For me, I still prefer the robust nature of A123 batteries but would change to LiIon batteries if I required the increased voltage.
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Old 11-10-2019, 04:47 PM
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Enquiring minds want to know...
Other vendors for LiIon or A123's?

Already have PAU and Booma on board..
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Old 11-10-2019, 04:54 PM
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Quote:
Originally Posted by Swampflier View Post
Enquiring minds want to know...
Other vendors for LiIon or A123's?

Already have PAU and Booma on board..
I just found out about this site and never ordered from them but plan to if i end up with another gas plane It is kinda slim pickings for A123 packs these days. http://www.leisurercmodels.com/life-...cessories.html

Also Wrongwayrc sells them


if someone must use lipos. and they much be up front only way i would do it would be to make a battery tray out of something where you could slide the lipo up into it. then maybe a strap at the back to hold in place. so it can be removed.

A123 packs are the only batterys i will charge inside my plane.
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Old 11-10-2019, 08:40 PM
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A123 2500 mah will be in stock this week.
http://www.taildraggerrc.com/a123-batteries/
Also some new 2s 15c lipo rx packs.
http://www.taildraggerrc.com/hv-lipo-rx-packs/
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Old 11-11-2019, 08:18 PM
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Mitsu,

Li-ion is a safer chemistry than li-po, same voltage. Typical packaging is metal cylinders, as opposed to plastic sandwiches, so they are physically more robust as well.

The 18650 cells used in vaping rigs and flashlights, that you can get anywhere like amazon, are li-ion. The trick is getting them made into rc packs. There are a ton of YouTube videos on diy battery welders with people making up packs for electric bikes, scooters, or what have you.

Personally, Iíd rather have a pack professionally made up, but itís not rocket science, and much safer than lipo packs for receivers.

In addition to the outfits mentioned above, radicalrc also makes them up

If youíre sticking with life, I heartily recommend NoBS batteries - he make up extremely high quality packs. I just wish heíd do li-ions....

Matt
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Old 11-13-2019, 12:21 PM
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Quote:
Originally Posted by Truckracer View Post
Today's LiIon batteries are very different than the ones produced just a few years back so they are clearly not old school. Technology has changed the reduced working voltage from what was common with the old LiIon batteries to where they are now the same as LiPo batteries. Add to that they now offer a higher "C" rating than what was available before. They are a far better product than they once were.

Is the working voltage really an issue? LiIon can cells where and still are 3.7v/cell. Modern lipos are also typically always labelled as 3.7 volts per cell.

EDIT - I will stand corrected... I dug though my closed to find my old Triton. It *did* have 3.6 and 3.7 modes but didnt specify which was LiIon orLiPo, just said to read the battery label.


Sorry for confusion!
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Old 11-13-2019, 01:39 PM
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So, ... I'm sold on trying Li-ions to solve my problem. What do you guys think of these Dynamite Reaction 3200mah 7.4V Li-ions sold by Horizon Hobby for $30! ... I think I got to do this
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Old 11-13-2019, 02:39 PM
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So, ... I'm sold on trying Li-ions to solve my problem. What do you guys think of these Dynamite Reaction 3200mah 7.4V Li-ions sold by Horizon Hobby for $30! ... I think I got to do this

It looks very good, Dynamite always have nice products.
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Old 11-13-2019, 02:46 PM
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Originally Posted by jharkin View Post
Is the working voltage really an issue? LiIon can cells where and still are 3.7v/cell. Modern lipos are also typically always labelled as 3.7 volts per cell.

I *think* it was actually earlier LiPo's where lower... think back to when all we had where the red Kokam cells and Thunder Power (and a 3S2200 cost $80!!).... possibly some of those where true 3.6 but my memory is a bit foggy.

Thinking about it even more, the only charger I ever owned that actually had different profiles for LiPo and LiIon was an original (c.2003) Great Planes Triton. It had 3.7 in LiIon mode and 3.6 in LiPo mode.
Interesting! Every modern hobby charger I've had since about 2000 had a LiIon charge routine that was different My first processor based chargers were the Orbit brand from Germany. In all cases the LiIon batteries were rated at 3.6 volts per cell (Vpc) nominal voltage, 4.1 Vpc max charge voltage. All LiPo batteries that I've worked with have always been 3.7 Vpc nominal voltage, 4.2 Vpc max charge voltage or .1 Vpc higher than LiIon across the board. I don't know if LiPo batteries ever were rated at a lower voltage as I've only used them in the hobby in the last 15 -17 years or so.

Several years ago the industry increased the nominal voltage on newer LiIon batteries by that .1V and I can remember consulting the various data sheets for confirmation. I don't use these batteries in the hobby but was curious about the change. All of my LiIon based power tools use the higher voltage.

Edit: Scouting through a number of different mfgr. data sheets, I see LiIon batteries rated at both voltages! Perhaps just a slight difference in the products between the various companies, but there are differences.
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Old 11-14-2019, 01:33 PM
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Output lead wire gauge?

Why don't some high performance batteries come with a more hefty guage output lead? The appearance of feeding the 14 gauge input leads of my Powersafe receiver with these 20 gauge outputs leaves me a bit "uneasy" ...


upload images
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Old 11-14-2019, 02:19 PM
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Agree on the lead size. If I bought that product, the first thing I would do is remove the shrink wrap and see what brand of cells the pack is made from. The lead could then be replaced. But .... easier to just buy a product with a known track record and desired configuration including lead size, connector type, etc.
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Old 11-14-2019, 02:27 PM
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Quote:
Originally Posted by Mitsu1 View Post
Why don't some high performance batteries come with a more hefty guage output lead? The appearance of feeding the 14 gauge input leads of my Powersafe receiver with these 20 gauge outputs leaves me a bit "uneasy" ...


upload images
Fromeco, you can get 16 gauge with deans, ec3, MPX, or JR connectors. I get the 16gauge and a second JR connector so I donít have to unplug them and can charge and load check them through the JR connector. If you need them with extra long leads, extra short, extra heat shrink..whatever, they will do it just ask.
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Old 11-14-2019, 03:39 PM
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Originally Posted by camss69 View Post
Fromeco, you can get 16 gauge with deans, ec3, MPX, or JR connectors. I get the 16gauge and a second JR connector so I donít have to unplug them and can charge and load check them through the JR connector. If you need them with extra long leads, extra short, extra heat shrink..whatever, they will do it just ask.
Ok, good information to have. I ordered the ones above though, already from Horizon Hobby. A couple things I've noticed though, looking at Fromeco's site, I don't see a balance lead shown on any, and they only show two sizes .. 2600mah or 5200mah. Also, I never see any C ratings on Li-ions it seems. No real idea what is supposedly going thru the leads of the Dynamite Li-ions here.
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Old 11-14-2019, 04:35 PM
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Originally Posted by Mitsu1 View Post
Ok, good information to have. I ordered the ones above though, already from Horizon Hobby. A couple things I've noticed though, looking at Fromeco's site, I don't see a balance lead shown on any, and they only show two sizes .. 2600mah or 5200mah. Also, I never see any C ratings on Li-ions it seems. No real idea what is supposedly going thru the leads of the Dynamite Li-ions here.
When I order from Fromeco i ask to have balance leads installed. They will put on what you want.
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