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>> Home > Forum > Boat Specific Chit Chat! > PROBOAT RECOIL 17 12.1 VOLT BATTERY
PROBOAT RECOIL 17 12.1 VOLT BATTERY
(306 views)
Author Message
Les-Forbes
(Captain)





Forum Posts: 59
8th Nov 2017 20:35  
>> Permalink
mdlbt.com/35543

Can anyone explain to me what the following statements, printed on this battery, means please.

1) 20C DISCHARGE RATE
2) 3C CHARGE RATE
3) 1300 mAh 3S 11.1v

If I purchase a futher battery at say 2200 mAh, would I need to make sure it discharges and charges at the same figures as the 1300 mAh above.


Attached Files - Click To View Large

Dave M
(Fleet Admiral!)





Forum Posts: 1428
8th Nov 2017 22:18  
>> Permalink
mdlbt.com/35554

Hi Les
It means what it says. Good to see a clearly marked battery for once.
You can discharge at up to 20 times the capacity 1300x20= 26000Ma or 26amps
It claims you can charge at 3 time capacity 3.9amps. Personally I never charge my Lipos at more than the rated capacity 1.3amps in your case.
The battery capacity is 1300Mah has 3 cells (3S) and a nominal voltage of 11.1v (3.7v per cell)

Each Lipo should be treated in accordance with its specs. A 2200mah battery may well have a different discharge rate. The dearer batteries usually have higher discharge capabilities.
Charging should be done individually and again in accordance with its specs.

Not sure why you are asking the final question but if you are thinking of using two batteries together they should have identical specs.
Personally I would advise against this as you run the risk of damaging a battery if all the cells are not balanced, not to mention the risks involved both personal and material.


Live long and prosper

Dave
Les-Forbes
(Captain)





Forum Posts: 59
8th Nov 2017 23:21  
>> Permalink
mdlbt.com/35559

Thanks Dave. That now makes sense. My last point was in thinking if I had a higher rated battery eg 2200 mAh I would be able to run it longer in the water than the supplied 1300 mAh.

Dave M
(Fleet Admiral!)





Forum Posts: 1428
9th Nov 2017 10:50  
>> Permalink
mdlbt.com/35569

Hi Les
The higher the ahr rating should give you a longer sail, assuming the current drawn remains the same. If you double the speed and use more current the benefit may be marginal
Dave


Live long and prosper

Dave
Les-Forbes
(Captain)





Forum Posts: 59
9th Nov 2017 20:50  
>> Permalink
mdlbt.com/35616

Thanks again Dave. Keeping with this same battery, can you tell me please if this battery has a JST, DEANS STYLE, MINI-TAMIYA, or a XT60 connector.


Attached Files - Click To View Large

RNinMunich
(Fleet Admiral!)





Forum Posts: 1126
9th Nov 2017 22:10  
>> Permalink
mdlbt.com/35624

Hi Les, NONE of the above!
It's an EC3 connector.
If you are going for hi speed hi amps I would recommend you swap both sides for XT60 or Deans connectors. Pic shows an EC3 (blue) to Deans/XT (red) adapter so you know what they look like.
You may find it easier to find batteries with the XT connector. Cheers Doug 😎


Attached Files - Click To View Large


Young at heart - slightly older in other places 😉 cheers Doug
Haverlock
(Fleet Admiral!)





Forum Posts: 425
10th Nov 2017 07:59  
>> Permalink
mdlbt.com/35637

if you can it may be better to cut off the original connectors and solder new XT60 connectors. They are not expensive and will make getting new batteries way easier.

https://www.ebay.co.uk/itm/20Pcs-10Pairs-XT60-Male-Female-Bu...


"that's not a bug its just an undocumented creature."

Sir Terence David John "Terry" Pratchett, OBE (28 April 1948 - 12 March 2015)
Les-Forbes
(Captain)





Forum Posts: 59
10th Nov 2017 09:09  
>> Permalink
mdlbt.com/35638

Can I leave this Li-po battery, which is fully charged as of 8th October, for a period of one week. I mean will it be safe to do that.

jarvo
(Fleet Admiral!)





Forum Posts: 497
10th Nov 2017 09:18  
>> Permalink
mdlbt.com/35639

Hi Les, No problem, you only need to put a storage charge in, if you are leaving them for months

Mark


Etherow Model Boat Club
Dave M
(Fleet Admiral!)





Forum Posts: 1428
10th Nov 2017 09:58  
>> Permalink
mdlbt.com/35642

Hi Les
If you are happy with this connector and your other equipment uses this type I would leave well alone.
If you do decide to change then I agree XT60 or Deans are common. Does mean you will need to change all the connectors on your equipment or get converters.

Not sure I agree with keeping Lipos at above storage charge for any length of time. I have had several of mine balloon before I knew better and I was using them every week.
I suspect high temperature may be a factor but that's just my opinion.
I now make sure any batteries I have charged are used even for a short time just to drop them from full charge. I use the air boat on the bench.
I do agree you should use a storage charge if you are unsure when you may use them again.


Live long and prosper

Dave
Les-Forbes
(Captain)





Forum Posts: 59
10th Nov 2017 12:48  
>> Permalink
mdlbt.com/35646

Thank Dave M.

It get's confusing when in the manual it states... Charge to half capacity after use. But of course, how can you charge it to half capacity, when the charger charges EACH cell separately. It's hair pulling out stage. LOL.


Attached Files - Click To View Large

Dave M
(Fleet Admiral!)





Forum Posts: 1428
10th Nov 2017 15:04  
>> Permalink
mdlbt.com/35652

Hi Les
Yes I agree there is no way with the charger supplied you can do anything other than charge to full capacity.
I do believe we have made suggestions on another thread on the site advising possible solutions. The cheapest would be to just buy a simple battery checker and make sure after you use the battery the voltage is around the 3.7-3.8v mark. Run a bit more to reduce and short charge to increase. If you are intending to become serious about modelling and using LiPos then, like most of us you will want to buy a charger that does the job for you automatically. There is a cost but if you protect your batteries they will last and save you money in the long term.
I've not had much hair for some years so probably that's why!


Live long and prosper

Dave
Les-Forbes
(Captain)





Forum Posts: 59
10th Nov 2017 22:37  
>> Permalink
mdlbt.com/35664

Yes Dave I'll do that in the interim. Thank for your help and suggestions.