Hi Dogman!dogman dan wrote:Depends on where to you want to go.
If you want to go to cheap, then typically a 20c rated turnigy pack is a good buy. ( when you run at least 10-20 ah of it) But its a horrible time to buy, right when summer is ending and batteries in stock are limited. I always looked for my new lipo in early spring, just after Chinese new year, like March or April.
If budget allows, then start asking about higher c rate flavors, especially if you want to go really light, and run 5-7 ah.
I sent you a PM.Ykick wrote:Good to see you Tommy L, ‘wondered what you were up to? Sorry about the missus - I hope your touring gig doesn’t take you too far for too long?
I still use combinations of 20C 5Ah RC Lipo with a cheap/small eBay BMS installed for charging only. While discharging the bike BMS will probably catch anything too serious and even if it does go up in flames at least a bike (like lawn power tool) is used outdoors.
Charging I feel better with a BMS but it doesn’t need to be a large powerful BMS. Something 10-20A is dirt cheap and when wired only for charging (discharge directly from pack leads) seems to be a practical compromise, in my experience. Still keep an eye on 'em and charge in a relatively fire-proof location.
Luna carries a nice small 18650 pack for about $300. Mighty mini, I believe? 650-700Wh Shark/Dolphin packs sell for about $500. Not a bad way to go if you don’t wanna play the RC Lipo odds?
Good luck and rock on bro!
And this is why i love this forum!neptronix wrote:You sure you wanna learn the ins and outs of a RC Lipo pack though? those 18650 packs have came down in price and aren't as 'splodey..
Tommy L wrote:And this is why i love this forum!neptronix wrote:You sure you wanna learn the ins and outs of a RC Lipo pack though? those 18650 packs have came down in price and aren't as 'splodey..
Im seeing the 18650 priced close to the
Hobby packs. But I no nothing of the
Sam/Pan cells. I take it the Sam/Pan cells
are safer? Are they as safe as LiFePO4's?
Over the past couple of years, those of us who follow LiPoly prices have seen the useful sizes(Read;Large)of the Multistar almost always deeply dis-counted. I just priced-out my current main pack of 4) MultiStar 6S/10,000 mAh from the US West warehouse-$270, which includes the shipping. That's 20Ah's of 44V, which on my bike produces a range of 30 to 40 miles! I don't follow the prices of round cells, But I thinking no other chemistry comes close in cost/energy capacity.Im seeing the 18650 priced close to the
ScooterMan101 wrote:If you do go with Hobby Lipo's , get two chargers, at least 7 amp each,
A Good Power Supply, 20 amps or more . Many here that use lipo's use the Meanwell Power supply's.
If you want high draw from the pack, and you do want to get the 18650's then get many in Parallel.
I will not do the math right now, but you would want at least a 5 p pack or more like 6 p ( How many Cells in Parallel )
These will be the higher priced and weight packs. do you have room in the frame for them ?
72v Panasonic PF 11.6ah:a few hundred more than the multistars, but does have a BMS and Higher current ability.
Thank you for that! I'd probably throw in another 4S / 12,000 mAh for 22Smotomech wrote:72v Panasonic PF 11.6ah:a few hundred more than the multistars, but does have a BMS and Higher current ability.
continuous discharge-50 Amps
3) MultiStar 6S/12,000 mAh-67 Volts:
price-$330(regular price, often on sale)
continuous disharge-40 Amp
All Good Points!999zip999 wrote:I would go with the luna pack. Plug and play. Bms so if you loan your bike or ? It has hvc lvc and current limit. Plus you don't need a barbecue or safe place to charge and store.
You are right, I didn't pay $200 for them, it was $177.90. Here is the pay Pal invoice for 2 of them;First you didn't pay $200 for those batteries you had to pay airmail from hong kong which as we know is more than the price of an additional pack
You just have to yell "fire" in a crowded house. I am so sick of you guys using scare tactics to try and justify the expense and complication of building a round cell battery pack.Now, this is for the cells without interconnects and protection, but interconnects are lightweight and your lipo still needs a connecting harness too. And the lipo batteries will need protection about equivalent to the weight of a case for 18650s, unless you want damage and fire.
Well, funny you should mention this. My main pack on my 2WD consists of 4) 6S/10000 mAh bricks configured 2S/2P for a 12S pack of 20000 mAh capacity and that cost me $270 shipped(want to see that invoice too?).The multistars CAN be pretty cost effective but you need to buy them in the 16ah or 20ah versions.