Battery storage?

[alpha33]

Using the "Barra 400E as an example, what is the proper way to store the battery long term ( say, 6 months or longer)? 0% charge, 25% charge ??? Should it be drained, stored separately from the gun or what? How long can it/should it be left fully charged/or drained ? Alpha33

 

[rc4fun]

It should be disconnected and charged/discharged to about 40%. Before using again it should be cycled 2 or 3 times to insure it's in good condition.

 

[BBGunn]

If it's a Lithium battery it should be stored at about 3.8-volts per cell. If you don't have one, buy a charger meant for RC hobby batteries. Most of those chargers have a, 'storage' mode on the charger that will charge (or discharge) your battery for you.

 

[alpha33]

thanks

 

[jps2486]

If it's a Lithium battery it should be stored at about 3.8-volts per cell. If you don't have one, buy a charger meant for RC hobby batteries. Most of those chargers have a, 'storage' mode on the charger that will charge (or discharge) your battery for you.

Yes, storage mode on R/C lithium chargers are set for about 83 percent charge.

 

[rcs9250]

Sorry, couldn’t help my self.

 

[Rgarbarino]

Yes, storage mode on R/C lithium chargers are set for about 83 percent charge.

It's less than like, more like 40%. I have RC cars that run LiON batteries and long term storage charge is critical. These batters can ignite/explode if store with a high percentage charge. I use this one

https://www.amazon.com/Genuine-Professional-Battery-Balance-Discharger/dp/B0722NGPBS/ref=asc_df_B0722NGPBS/?tag=hyprod-20&linkCode=df0&hvadid=312136795426&hvpos=&hvnetw=g&hvrand=17695382430151927849&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1014221&hvtargid=pla-569131670574&psc=1&mcid=4f2babf985493a779209d08f6767e604&gclid=Cj0KCQiAqsitBhDlARIsAGMR1RgQjM_zVEkNPoTYdUncuFJqEzgcRwUOEOw8ki7iYjO7HBHn45ypV-YaAseCEALw_wcB

 

[dizzums]

its about 80 .. lipos dont keep well period though lithium ion a bit better ...

 

[BBGunn]

There is no risk by storing your Lithium batts fully charged but if you do so the batteries will lose overall capacity quickly. The reason we store them at 3.8V per cell is to retain the battery's capacity for as long as possible.

I've been in all the various RC hobbies over the decades, including large RC battery powered aerobatic helicopters.

Currently, the only hobby Lipo I run is the one I use to power the full featured fishfinder I use on my float tube!

 

[Sawney Bean]

I've ripped apart a lot of Lion battery packs to get the 18650 cells out of them, many of which were put away for years with a full charge, (telephony modem backups). I've never seen any that had exploded and we have bins of these things at my work.

 

[karl_h]

Using the "Barra 400E as an example, what is the proper way to store the battery long term ( say, 6 months or longer)? 0% charge, 25% charge ??? Should it be drained, stored separately from the gun or what? How long can it/should it be left fully charged/or drained ? Alpha33\

Like the smart ones said 40-50 percent charge for a LIPO battery in long term storage. The simple fact you are asking says a lot, I bet you don't use a programmable balance charger, because if you did you would know more and not ask in all likilyhood. If you are worried about longevity on your battery pack, you need to use a hobby charger where you choose the max current to charge at, it would also allow you to disharge a pack for storage to the correct level, or if you were below to charge it up to the correct level for storage. For the longest life of any chemistry lion battery pack, you should charge at a current rate equal to 20 percent of the packs amphour rating. For your bara, i think it is a 2100 mah pack, 20 percent of that would be 0.42 amps or 420milliamps however you want to state it. It takes longer to charge that way, but is way easier on the battery and it will last longer. I'm assuming you use a wall wart balance charger on your pack, it is likely a 1amp max current charger which is more than twice the current you want for max life. If you want to add another bit of lifetime to the battery, program the max voltage on the hobby charger to stop charging at 4.1 volts instead of fully charging to 4.2 volts, you give up virtually nothing in capacity and gain a small bit in service life.

 

[Spartan]

Sorry, couldn’t help my self.

View attachment 428942

Want to do the math on number of car fires per unit on the road comparing EVs to combustion engines??

Hint: One of them makes the news every time it happens because people have an agenda. The other one almost never makes the news.

Your meme exists because of a lack of critical thinking and research.

FWIW, I don't even own an EV. It just annoys me when people blindly perpetuate the internet falsehoods.

 

[rcs9250]

Want to do the math on number of car fires per unit on the road comparing EVs to combustion engines??

Hint: One of them makes the news every time it happens because people have an agenda. The other one almost never makes the news.

Your meme exists because of a lack of critical thinking and research.

FWIW, I don't even own an EV. It just annoys me when people blindly perpetuate the internet falsehoods.

 

[Spartan]

There's a term for how you present information. It's called cherry picking.

You seek out stories that fit your narrative and then present them as the norm.

You have not considered how many building fires in Queens were also caused by other means during that time and how that relates to the total number of battery fires that occurred during that period.

Yes, high density batteries can be dangerous. They can and will cause fires when abused. But they are typically much less dangerous than the other combustibles that surround our lives. The ones that cause many more massive fires often and every day.

You have been programmed by very wealthy groups to spew their disinformation for them since they have a very keen interest in making sure EVs don't suck away too much of their petroleum money. You do their bidding for them on social media. You re-post these pics and memes because they are funny and popular. You get likes and shares for kicking the supposed enemy. They are using you as a puppet. Just keep that in mind.

And I'd be willing to bet that you've never even seen or experienced a battery fire first-hand, despite your memes. There's a really good reason for that. An obvious reason if you cared enough to actually consider it.

 

[rcs9250]

There's a term for how you present information. It's called cherry picking.

You seek out stories that fit your narrative and then present them as the norm.

You have not considered how many building fires in Queens were also caused by other means during that time and how that relates to the total number of battery fires that occurred during that period.

Yes, high density batteries can be dangerous. They can and will cause fires when abused. But they are typically much less dangerous than the other combustibles that surround our lives. The ones that cause many more massive fires often and every day.

You have been programmed by very wealthy groups to spew their disinformation for them since they have a very keen interest in making sure EVs don't suck away too much of their petroleum money. You do their bidding for them on social media. You re-post these pics and memes because they are funny and popular. You get likes and shares for kicking the supposed enemy. They are using you as a puppet. Just keep that in mind.

And I'd be willing to bet that you've never even seen or experienced a battery fire first-hand, despite your memes. There's a really good reason for that. An obvious reason if you cared enough to actually consider it.

Thank you for that fine forensic analysis. (Rose from Titanic. )

 

[Summaryn]

Storing it fully charged or fully drained can shorten its lifespan. Definitely store it separately from the gun in a cool, dry place.
As a general rule, you don't want to leave it fully charged or drained for more than a few weeks. Charging it to about 50% and checking it every few months should keep it in good shape.
Also, you might want to look into high power pulse capacitors. They have different storage and maintenance requirements but offer some interesting insights into battery tech.

 

[HogKiller]

There's a term for how you present information. It's called cherry picking.

You seek out stories that fit your narrative and then present them as the norm.

You have not considered how many building fires in Queens were also caused by other means during that time and how that relates to the total number of battery fires that occurred during that period.

Yes, high density batteries can be dangerous. They can and will cause fires when abused. But they are typically much less dangerous than the other combustibles that surround our lives. The ones that cause many more massive fires often and every day.

You have been programmed by very wealthy groups to spew their disinformation for them since they have a very keen interest in making sure EVs don't suck away too much of their petroleum money. You do their bidding for them on social media. You re-post these pics and memes because they are funny and popular. You get likes and shares for kicking the supposed enemy. They are using you as a puppet. Just keep that in mind.

And I'd be willing to bet that you've never even seen or experienced a battery fire first-hand, despite your memes. There's a really good reason for that. An obvious reason if you cared enough to actually consider it.

Not to start a chain reaction, but the S. Korea battery plant fire that killed 22 recently or the recent recycling plant that went up. A local house went up, they rebuilt but they separated the garage from the house. Are incidents cherrypicked, perhaps but that is a two way street. BUT that meme was funny. Now we'd best short circuit this discussion before the Mods flip the switch. Sorry that pun wrote itself.

Peace Love and Pellet Guns

 

[Caliber 22]

I did not know what battery is in the Barra 400E so I searched. It is a Lithium Ion Polymer. The nominal voltage is 3.7 volt / cell, fully charged = 4.2v/c, (Some RC batteries can go to 4.3v/c.), fully drained = 3.2v/c and storage charge = around 3.6, preferably in a cool place. I used to store it in a small fridge set at 5 deg. Celsius in my hobby room.

For other batteries: Lithium Ion (without polymer separator) Max charge is 4.1v/c. Storage also around 3.6v/c.

Lithium Iron Phosphate (LiFePO4) Nominal volt 3.2v/c, max charge 3.65v/c, min. charge 2.8v/c (Some higher, some lower) Storage, 3.2v/c.

Some older airsoft used AA rechargeable batteries I think. Store fully charged.

 

[Peashooter]

Always store charge your LIPO batteries, or they will last very short, and first sign will probably be them starting to puff up.
I cycle my rare use LIPO batteries once a year, so that mean charge them back up to full, and then discharge them to storage level.

This is quite a job as i have quite a few LIPO batteries from the RC hobby, also my G-scale trains run on batteries as track power is way too much of a pain on a outside layout.