Best Electric Bike Battery Option

Hi everyone,

 

I am new to pedelecs and I saw that you help a lot in information sourcing.

 

I am building an urban ebike and I am trying to pick a decent quality ebike battery.

 

I was going to purchase from Unit Pack Power but a friend of mine told me about couple of cases which their batteries caught fire. Also I am looking for a branded battery with A Graded cells like LG or Samsung.

 

The rear hub is 1500W and I need decent Continious Discharge 30-40A.

 

I have read comments about Greenlance E-Bike battery and Battery Empire but would appreciate any information about them and genuine reviews if anyone bought from them.

Hi everyone,

 

I am new to pedelecs and I saw that you help a lot in information sourcing.

 

I am building an urban ebike and I am trying to pick a decent quality ebike battery.

 

I was going to purchase from Unit Pack Power but a friend of mine told me about couple of cases which their batteries caught fire. Also I am looking for a branded battery with A Graded cells like LG or Samsung.

 

The rear hub is 1500W and I need decent Continious Discharge 30-40A.

 

I have read comments about Greenlance E-Bike battery and Battery Empire but would appreciate any information about them and genuine reviews if anyone bought from them.

For 48v batteries, Greenlance:

https://greenlance.co.uk/collections/shop

They've a 48V 20AH Samsung Cells 21700 Battery for an unbelievable £280 delivered, amazing, but

finds ads, one Amazon review that's been taken down, "isn't my battery fast" on Youtube and... you here on Pedelecs This is at least your third prop for them, time to share what you know!

Edited November 19, 20232 yr by AntonyC

The link to 5A 'charger How Long Does An Electric Bike Battery Last? Explore Benefits of 5A Fast Charger!' doesn't work...

 

Surely that cannot be good for any battery pack?

I found this error too and I have contacted them trough the live chat. They explained that they just updated the page and experience issue with the coding.

 

I think they are genuine and even purchased Greenlance E-Bike Battery 48V 20AH

https://greenlance.co.uk/collections/samsung-electric-bike-batteries-greenalance/products/electric-bike-battery-48v-20ah-samsung-cells-21700-premium-quality

 

I used the BlackFriday20 discount and I paid under £310.

 

This is the best deal i could find on the market (quality based).

 

I added a 5A charger and I paid some on top for order protection as I don't trust them UPS and DPD drivers.

 

 

Will follow up after I receive the battery!

https://reddragonebikes.co.uk/shop/48v-20ah-lithium-ebike-battery-lg21700-new-and-a-grade-cell-5000mah-14s4p-ebike-batteries-uk/

 

Surely that cannot be good for any battery pack?

 

super charging these batts will reduce there life alot same as nuking the things amp wise

I Purchased it to have it as an option.

 

However I am not going to use it every day, but it is nice to have it as an option when in comes in handy. Plus the Samsung A Graded Cells should last more as said 1500 lifecycles. Reduce this by 20% I think it is still a fair price. I added their led bar bike lights to my order just now as I think the products looks cool and seems very bright.

 

Will follow up on this too!

you wont get anywhere near 1500 charge cycles esp at that voltage and amps m8 has a bafang had with a 30a controller and 48v batts and there is range loss wit less than 100 charges on it so uses i think 4 now as uses it for work.

 

still cheaper than a car fkn batt for my bike is £630 and can bus locked mofos

you wont get anywhere near 1500 charge cycles esp at that voltage and amps m8 has a bafang had with a 30a controller and 48v batts and there is range loss wit less than 100 charges on it so uses i think 4 now as uses it for work.

 

still cheaper than a car fkn batt for my bike is £630 and can bus locked mofos

https://www.pedelecs.co.uk/forum/threads/run-your-bosch-ebike-on-any-36v-battery.46411/

The rear hub is 1500W and I need decent Continious Discharge 30-40A.

What you 'need' is a motorbike.

I have 1500W rear hub and went with 52V pack 17.5AH LG branded Halion...£500 from UK importer...18months old and zero issues so far.

 

If they are recycling cells you would assume some knowledge/skill so I find it strange they offer a 5A charger.....makes little sense to me, recycle then kick feck out of it at 5A?

everything is a throw away item these days id drive a electric car like a dragster how far will it go mr dealer

Plus the Samsung A Graded Cells should last more as said 1500 lifecycles. Reduce this by 20% I think it is still a fair price.

Samsung 50E spec

Capacity ≥ 80% of the Rated Discharge Capacity after 500 cycles at Discharge: 1C (4,900mA).

 

In other words for the pack 19Ah new and at least 15Ah after 500 cycles of supplying 19A in round figures.

Since the beginning of ebike batteries, the recommended charging rate has been 0.2c, which would be 4A for a 20Ah battery. 5A would be 0.25c, which is still pretty close, so it's not going to kill your battery; however, the slower you charge and the lower your discharge rate, the longer it will last. Running at 30 to 40A will shorten the battery's life much quicker than charging at 5A, so go for it if you need to save charging time. At only £300, you can afford to wear out the battery quicker than a £500 one.

... provided the £300 one also starts out with 500 cycles (to 15Ah). [mention=41088]David989[/mention] at those prices if you have a Wh meter a detailed review would make you very popular here

I use Shimano EC-E8004 4.6A battery chargers on my Shimano BT8014 11.8Ah batteries, which is therefore 'officially approved', and a charge rate of 0.39.

 

The marked charge rate only applies in the 'CC' part of the charge cycle, as current is progressively reduced in the 'CV' part.

I charge my inexpensive Amazon bought 19.2Ah battery containing LG MH1 cells, using a basic charger at 2A, and surprisingly it's still working great after almost three years of good use. It's a hard working battery - until a couple of months ago the controller had been limited to 15A, now increased to 18A... this change may usher forward it's demise a bit. In about a year or two, I'll be in the market for a new one. I hope there will be a good quality 36V battery available that uses the same case and mount form factor, that I can buy from a UK seller by then. If not, I'll possibly attempt to buy another of the same from IEBIKE on Amazon, if he has one stocked in the UK.

Edited November 20, 20232 yr by guerney

I have asked for their battery specification sheet.

 

They have certified 14S 4S battery pack setup

 

21700 5000mAhSamsung cells A Graded they provided the certificate. I wouldn't hate on then or doubt their quality as they seem very helpful.

 

So far I am

impressed.

They have certified 14S 4S battery pack setup

 

Is there some government body that certifies ebike batteries? Who certifies their batteries?

Edited November 20, 20232 yr by guerney

The batteries are manufactured in China so the certificates are fro Waltek licensed Chinese company for producing certificates.

 

Also they meet all UK certificates which only added to the option for upgrade or buying another battery as I would be able to use the same mounting plate.

The batteries are manufactured in China so the certificates are fro Waltek licensed Chinese company for producing certificates.

 

Also they meet all UK certificates which only added to the option for upgrade or buying another battery as I would be able to use the same mounting plate.

I'm new to this forum, I was speaking to a scientist in Galway University battery technology, and he told me you could extend the life of a Li-on battery by as much as 4 times, e.g. from 1,000 to 4, 000 cycles by charging to 80% and recharging at 20%. Definitely worth a try.

Your Galway scientist is talking from his understanding of how lithium cells behave. In that sense he/she is correct. However it does not take into account the battery management systems used in e bike batteries. These only balance the multple strings of cells at the top of the charge. So, by only charging to 80%, there will be no balancing. On a good quality battery, made from good quality cells balanced at manufacture, this shouldn't be too much of a problem, but will still need balancing periodically. An out of balance battery will loose capacity as the lvc will cut in when the lowest cell string reaches that voltage.

Least stressful approach seems to be use it, charge it. Don't run it to flat, if you can help it, and use the the supplied charger - preferably 2A.

I suspect that the 20-80 approach is what is done with E.V. batteries to extend their life. However the control systems on these batteries is far more sophisticated as weight is not such a critical issue.

I'm new to this forum, I was speaking to a scientist in Galway University battery technology, and he told me you could extend the life of a Li-on battery by as much as 4 times, e.g. from 1,000 to 4, 000 cycles by charging to 80% and recharging at 20%. Definitely worth a try.

Definitely not worth a try unless you want to shorten the life of your batterey and/or have other problems. You didn't undersatnd the context of what he was saying. He wasn't talking about ebike batteries, which must be 100% charged. Did you not wonder why every single mainstream ebike manufacturer gives you a charger that charges to 100% and a manual that tells you to charge to 100%? Do these companies not have their own scientists?

 

BTW, if you want your ebike battery to last 10 years or more, there's a much easier way. You just take it off your bike and put it in the cupboard under the stairs and leave it there.

 

Here's something to think about.

1. Only using 20% to 80% reduces your useable capacity from 100% to 60%, so the expensive long-range battery is completely wasted, or you'd need to buy a battery twice as big and expensive to get the same range.
   
2. When you charge to 80%, your motor will make 20% less power all the time you're using it.
   
3. A typical ebike battery can do at least 500 full cycles. Say you use half of its working capacity every working day. That means the battery will last at least 4 years. If you increased it's life by 4 times, as suggested, it's life would be 16 years. In 16 years time, nobody would want to use a battery like that. If you look back at the batteries we were using 16 years ago, they were hideous. You'd want to sell your bike and get a new one. There's no point in making a battery last that long.
   

Edited November 20, 20232 yr by saneagle

Even 500 cycles at 30 miles range is 15,000 miles. How many bikes actually get that much use?

 

As long as you are not caning your battery, just ride the bike and follow normal charging instructions.

Even 500 cycles at 30 miles range is 15,000 miles. How many bikes actually get that much use?

 

As long as you are not caning your battery, just ride the bike and follow normal charging instructions.

[/QIgnaUOTE]

Hi You are correct on the E V car battery comment, that is the area they are working on. Ignorance is bliss....