PSWPower - which 48v G70 battery - or neither?

[saneagle]

Two screws, 65 cells and it holds fine on two bolts.

Until it doesn't. You could just as easily argue that seatbelts in cars are unnecessary because you drive without one and have never been thrown through the windscreen, or you don't need a fuse on your lights powered by the main battery because the wires have never shorted.

 

[Kevin williams]

A 20Ah HL type battery will hold fine with one screw if you keep your bike parked in your shed.

lol , I do roughly 15,000k a year

 

[Kevin williams]

Until it doesn't. You could just as easily argue that seatbelts in cars are unnecessary because you drive without one and have never been thrown through the windscreen, or you don't need a fuse on your lights powered by the main battery because the wires have never shorted.

Not the best analogy, 3 bolts aren't enough either then ...........

 

[Az.]

Until it doesn't.

I can say the same about keeping battery at home.

I will start to worry when I see people here reporting problems, but I hear what you are saying... it might be worth to add some extra protection.

 

[Cadence]

To conclude this topic, I finally pulled the trigger on a 48v 15Ah G70 Hailong battery from PSWPower. When trying to order on their website a message comes up saying they do not ship batteries to the UK. However, in response to an email request I got a Paypal invoice for £159.74. The battery arrived in 4 days with no further charges for VAT or duty.
The G56/G70 battery carrier has a full length aluminium rail that I was able to use without drilling my bike frame:-


I removed the two middle (of 4) small nuts and screws and the holes were almost spot-on for the bottle cage mounts, so I opened them out with a 5.5mm drill and slightly elongating one of them. I've tried mounting the battery and riding over some quite deep potholes - in conjunction with an old fashioned toe strap the battery is held firmly and doesn't even wobble slightly.
What a difference 48v. makes! I have a KT 15A controller which I had previously shunt soldered to I guess around 18A. This was fine with 36v., but on test with 48v. I found that PAS 1 was just too powerful. PAS 5 was ridiculous- steep hills flattened and controller and motor still cold to the touch. I've since knocked the C5 setting back to 8, which I guess is around 15A. This gives more control in the lower PAS settings and the bike still goes up hills like they hardly exist.
I have my Yosepower Hailong HL-1 battery carrier mounted on a piece of marine plywood on top of the rear rack so I can carry the 36v. 13Ah as a spare range extender if needed:-



The controller sits in an electronics enclosure box (with ventilation holes in the bottom) on the rack stays but I've not bothered with any fancy switchable wiring. There is an XT60 plug on the end of the controller cable and each battery carrier has an XT60 socket cable concealed under the rack. I can just pull them out and swap them over when needed. With panniers mounted, this is my "long range tourer". In reality I doubt I'll ever need to use the full range of both batteries but it's nice to have a bit of "insurance" on long rides.
BTW, the motor is Yose Power's 250w. cassette version and performs very well on both 36 and 48v.

 

[thelarkbox]

Looking Very good, have you considered one of those semiridgid rack length style rear rack panier top box thingies to semi stealth the battery?? -sorry for the link but it should be illustrative..

 

[guerney]

...or you could unstealth the rear rack battery using a couple of waterproof hi-viz rucksack covers, because one cover isn't waterproof enough, and you're safer from traffic unstealthed. Old long exposure photo on top of a hill overlooking the city using only moonlight, one summer night while enjoying a kebab and coke offcamera, after a hard day's work. I've added lights and tidied the wiring since, installed a longer suspension seatpost, pneumatic saddle, and other stuff...

 

[saneagle]

...or you could unstealth the rear rack battery using a couple of waterproof hi-viz rucksack covers, because one cover isn't waterproof enough, and you're safer from traffic unstealthed. Old long exposure photo on top of a hill overlooking the city using only moonlight, one summer night while enjoying a kebab and coke offcamera, after a hard day's work. I've added lights and tidied the wiring since, installed a longer suspension seatpost, pneumatic saddle, and other stuff...


View attachment 63108

Nothing says ebike more that a pair of panniers sitting too high on a rack or some mysterious fabric covering something on the rack. You not kidding anyone with that!

 

[saneagle]

Now I've got two KT controlled bikes, the next step is 48v rather than 36v. I've been looking at PSW's Hailong G70 batteries, mainly because the brackets have more fixing holes and seem to offer more flexibility in fitting in the restricted space in the frame triangle.
Cell types and capacities are a complete mystery to me so I'd welcome some comments on which of these is the better spec:-

48v. 15Ah with 3P13S Li-ion 5Ah 21700 39pcs battery cells (the interior battery is SAMSUNG INR21700-50GB 21700 Li-ion battery)
or
48v. 17.5AH with 5P13S Li-ion 65pcs battery cells (the interior battery is SAMSUNG INR18650-35E3 Li-ion battery)

Electric bicycle ebike Battery Hailong G70 G56 Pack 48V 36V 17.5AH 15AH 20AH 13AH Bicycle Lithium ebike Battery Lithium fits1000W

Electric bicycle ebike Battery Hailong G70 G56 Pack 48V 36V 17.5AH 15AH 20AH 13AH Bicycle Lithium ebike Battery Lithium fits1000W

www.pswpower.com

Obviously the 17.5Ah has a claimed higher capacity and is more expensive, but are 18650 cells better then 21700? I'm thinking in terms of battery life and voltage drop.
They don't state weights, but I would imagine the 17.5Ah is much heavier? They are both the same size.
Lastly, there doesn't seem to be many outlets for G56/G70 style batteries. Is this because it's a relatively new product or being superseded by others? I don't want to find they are discontinued in a few years time.

The 36v Yose 250w motor with a 48v battery and KT controller is very close to ebike nirvana. It's a shape they changed from KT controllers to crappy Lishui ones. They must be nuts.

 

[guerney]

You not kidding anyone with that!

I'm not trying to! I'm as unstealth as possible for safety. Shocked, SHOCKED I aint been stopped by know nothing rozzers yet. They'll never take me alive.

 

[saneagle]

I'm not trying to! I'm as unstealth as possible for safety. Shocked, SHOCKED I aint been stopped by know nothing rozzers yet. They'll never take me alive.

Pull the other one! Anyway, they'll have you for stealing that high viz. You could have at least remove the big blue letters that say "police".

 

[Cadence]

Looking Very good, have you considered one of those semiridgid rack length style rear rack panier top box thingies to semi stealth the battery?? -sorry for the link but it should be illustrative..

Not really. When I set out on this EPAC malarkey I was concerned about making it stealthy to avoid theft. The first iterations of this bike had the battery on the rear rack only and with one of those "waterproof" Hailong battery covers and panniers fitted it made a passable impression of a loaded analogue touring bike to the uninitiated, particularly with a waterproof jacket strapped over it:-



I can still do this, but there is no disguising the bigger downtube battery. At least I don't have to worry about Plod as this is fully compliant. My other bikes however.....