Field Charging with leisure battery

[chrisleematt21]

I would like to be able to charge my packs at the field and get a few more flights in each session.

Currently i have a 100ah leisure battery which I used to use for my 2200 3s packs, it would charge them all day and never have issues.

Now I am using 6s 5000 I can only get about 2-3 charges out of it before its flat.

If I had 2 leisure batteries and connected them in parallel would this get me 4-6 charges? or more as it would be 24v so more efficient??

[Planehazza]

I would like to be able to charge my packs at the field and get a few more flights in each session.

Currently i have a 100ah leisure battery which I used to use for my 2200 3s packs, it would charge them all day and never have issues.

Now I am using 6s 5000 I can only get about 2-3 charges out of it before its flat.

If I had 2 leisure batteries and connected them in parallel would this get me 4-6 charges? or more as it would be 24v so more efficient??

Yes, I think so. You're charging 24v from 24v so you don't need to double the current to get the same Wattage, so in theory you should get twice as many charges, but efficiencies will lower this a bit.

However, to go from 12 to 24v, you'd need to wire them in series, not parallel.

[chrisleematt21]

Yes, I think so. You're charging 24v from 24v so you don't need to double the current to get the same Wattage, so in theory you should get twice as many charges, but efficiencies will lower this a bit.

However, to go from 12 to 24v, you'd need to wire them in series, not parallel.

Brill thanks. Now to buy another leisure battery.

[Planehazza]

Brill thanks. Now to buy another leisure battery.

I'd wait until someone who has tried this chimes in. I'd hate for you to spend the money and follow wrong advice from me.

[chrisleematt21]

I'd wait until someone who has tried this chimes in. I'd hate for you to spend the money and follow wrong advice from me.

Good plan

[Planehazza]

Good plan

I'm pretty sure that what I've said is right in theory, but I haven't done it in practice. What I do know is that I sharp got sick of carrying around a 17KG battery, so bought a genny. I never used it so just gave up on field charging and took my G4 nitro for lots of flying. I keep to electric if I only have time to get a few flights in.

[chrisleematt21]

I looked at a gene but I only have a smallish car plus I don't have anywhere to store it or the fuel. The batteries aren't too bad I have had one in my boot for a couple of years now and hardly notice it tbh.

[JamieD]

Yeah but if you factor in the cost of the batteries surely your getting close to the cost of a genny or at least a second hand genny...

I can't inagion a leisure battery would put up with high current discharges for long. A genny would last for years.

[chrisleematt21]

Yeah but if you factor in the cost of the batteries surely your getting close to the cost of a genny or at least a second hand genny...

I can't inagion a leisure battery would put up with high current discharges for long. A genny would last for years.

Yeah but as I said before I looked at a gene but I only have a smallish car plus I don't have anywhere to store it or the fuel.

Leisure batteries are more preferable to me over a gene.

[Planehazza]

A genny is the size or smaller than 2 leisure batteries

[myxiplx]

The math works out, two batteries gives you roughly double the number of chargers of one battery. And as a bonus you'll not be pushing the batteries so hard as they're sharing the load, and you may not be discharging them so deeply either (You'll need to fly twice as much as you do now to drain the batteries as low), so you'll actually prolong the life of the batteries a bit too.

But I'd still buy a genny :-p

[fishfiend]

Get one of these and be done..not massively expensive and you can charge all day..Impax IMDY1500LBI 1200W Inverter Generator 230V | Generators | Screwfix.com

[shades]

A genny is the size or smaller than 2 leisure batteries

That genny works great Harry.... charge all day :-)

[Planehazza]

That genny works great Harry.... charge all day :-)

Yeah it was great what little use I gave it. The local club weren't too keen on it either. I still love the G4 so I just fly that back to back. The leccys are great on days when I'm only going to be there a couple of hours etc.

[tomatwalden]

I'd wait until someone who has tried this chimes in. I'd hate for you to spend the money and follow wrong advice from me.

LOL - lack of faith in your own advice!

Seriously - I second the advice on getting a generator. I tried a leisure battery, they were a PITA compared to the genny I finally got. The genny is lighter (much lighter), more convenient, charges more packs, etc. etc.

No two ways around it, a genny is the right choice! The one linked to looks good if you're on a budget (like I was) - I went with this one which still serves me well : Evopower EVO1000i 1kW Suitcase Inverter Generator | ThePowerSite

But if you've got a bit more cash, then a Kipor, Hyundai or Honda are popular too.