Is it better to use AW 18650 Protected 2900 mAh on Reo Grand?
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It is better to use the recommended AW IMR 18650 Safe Chemistry battery in your REO Grand. The protected one is longer, and may compress your spring too much. In the event of a short circuit, the spring in your REO will collapse, breaking the connection. If the spring is too compressed, the connection will not be broken, and serious damage may occur.
Hope this helps.
Hope this helps.
As far as I know, the protected ones don't hit as hard and the MAH listed are usually a lot higher than reality. That's what I've gathered from reading threads on here.
The AM IMRs might be a lot lower in listed MAH, but they make up for it with performance... and they are "safe chemistry"
The AM IMRs might be a lot lower in listed MAH, but they make up for it with performance... and they are "safe chemistry"
Both of these are safe. One uses a PCB, the other is the compounds that make up the battery. Don't use anthing bigger than a 2400mah protected battery because of the length. If it fails and causes a short, you need the little bit of wiggle room for the spring to collapse so that it doesn't cause any other damage to the Reo.
How does the spring collapse due to a short? Just curious about that seeing as how I have a Reo Grand coming in the mail 
In the event of a short, the temperature will melt the spring, causing it to collapse. Gravity should do the rest, dropping the battery away from the firing pin
Can the AM IMRs be charged on a normal lithium ion charger? Want to be ready for when the grand lands
Yup. As long as it fits the 18650 size, you should be good. Off the charger voltage is 4.2V
The only thing that matters is the output of the charger.
"Lithium Ion Charger" is a bit of misnomer, because any rechargeable battery rated for its output would be fine. It's just that the vast majority of batteries that would be rated for its output are indeed Lithium Ion.
I believe the AM IMRs are Li-MN as opposed to Li-ion, but are still rated for the output of a standard 18650 charger.
"Lithium Ion Charger" is a bit of misnomer, because any rechargeable battery rated for its output would be fine. It's just that the vast majority of batteries that would be rated for its output are indeed Lithium Ion.
I believe the AM IMRs are Li-MN as opposed to Li-ion, but are still rated for the output of a standard 18650 charger.
you know I see so many things about batteries. think about this. to have a short you would have to see a few things happen. the atty or carto would have to have a dead short, the switch would have to stick, and the atty or carto would have to continue shorting. one could unscrew the atty or carto quite easy and problem gone. I'm using a protected 2600 in mine, it's not that tight and the pc board would fry. I have zero fear of an explosion, maybe a vented battery worst case scenario... and even then the battery is surrounded by metal with a vent hole (bottle squeeze position) to prevent a pressure build up.
honestly. how many examples of exploding batteries has anyone really seen here? or is it just re typing what they have read?
honestly. how many examples of exploding batteries has anyone really seen here? or is it just re typing what they have read?
Yeah, the potential, however minute, is there so people will talk and fret about it.
I mean, how many of you have been blown up while flying in a plane? Still doesn't stop the fear mongering
I mean, how many of you have been blown up while flying in a plane? Still doesn't stop the fear mongering
I just mention it because I was involved in changing regulations to allow lipo in rc racing and all the fear mongering was so prevalent. now it's the most common class. I've crashed helis into frozen ground and bent them to look like hockey sticks, had one in a radio that accidently turned on and drove from quesnel home (about a 9 hr drive) and overdrained them... even then I have done stuff like charge with a nmh setting to get the voltage high enough my lipo safe charger wouldn't show voltage too low errors.. (not recommended but I like to experiment).
I've witnessed 2 fires from lipos in rc cars, high voltage systems that were drawing 100 plus amps and speed controls getting hot enough solder melts and dead shorts happen. or gears chewing through the sides of batteries (user error not mounting things properly)
I've honestly witnessed more fires (and had one myself) with nmh batteries and even had a nicad go in my van charging batteries on the way to racing, driving down the #1 hwy haha. wtf is that smell... omg I gotta pull over.
I've witnessed 2 fires from lipos in rc cars, high voltage systems that were drawing 100 plus amps and speed controls getting hot enough solder melts and dead shorts happen. or gears chewing through the sides of batteries (user error not mounting things properly)
I've honestly witnessed more fires (and had one myself) with nmh batteries and even had a nicad go in my van charging batteries on the way to racing, driving down the #1 hwy haha. wtf is that smell... omg I gotta pull over.
^ good advice. I had the AW IMR in mine when the spring collapsed, and and it scared the hell out of me, but at least my face didn't blow up!
edit: I don't actually know what would've happened otherwise actually, but I'd be ...... if it did blow up
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Yup. As long as it fits the 18650 size, you should be good. Off the charger voltage is 4.2V
Sweet all ready to go!
I always accidently charge my alkaline bats on my nimh charger. It starts to hiss and bubbles, I just make sure it's over the porcelain tile now. The Duracell alkalines and nimhs look almost the same. Except for the bright green strip on the nihms that I always manage to miss
Now if it was a protected battery wouldn't the battery itself have shorted out before melting the coil or no? anyone know?
the protected battery should pop something on the pc board before it explodes. protected just protects from overcharging but it's pretty commonplace to have reverse polarity protection and a fuseable link added
I should add I have seen fires in rc's running nmh too when esc's overheat etc. I have yet to see an explosion though. a lot of fear goes back to when lithium chargers first came out. people would choose auto function rather than set the charger for how many cels etc. well auto detects the voltage and charges. problem is a fully charged 2 cel resembles a discharged 3 cel so putting a fully charged 2 cel on and it overcharges it.
other problems came from using an improper power supply, such as an automotive battery charger. some chargers had errors and caused problems. most of the time it was user error though
I should add I have seen fires in rc's running nmh too when esc's overheat etc. I have yet to see an explosion though. a lot of fear goes back to when lithium chargers first came out. people would choose auto function rather than set the charger for how many cels etc. well auto detects the voltage and charges. problem is a fully charged 2 cel resembles a discharged 3 cel so putting a fully charged 2 cel on and it overcharges it.
other problems came from using an improper power supply, such as an automotive battery charger. some chargers had errors and caused problems. most of the time it was user error though
I really hope all the knowledge I am accumulating here betters the world at some point someday
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