Battery charger recommendations

[Geneva]

One of the battery chargers made a clicking sound so we probably need to replace it. I'm going to replace both just to be safe. Appreciate any advice.
On edit
The charger makes the sound just before the light goes from red to green, more of a few clicks. Its not hot and doesn't smell. I had it charging the battery to see if i could get it to replicate the sound and it did, DW heard it when I was outside.
Thanks

 

[Jeremy McCreary]

If possible, safest to replace with the bike manufacturer's charger for your battery. That way you know they're compatible from a battery management system (BMS) standpoint.

 

[PedalUma]

It is really odd output for a charger. Like a tire pump it needs slightly more output than the final pressure or in this case voltage. A 36V battery takes a 42V output charger. A 48V output charger is weird. Unless it is really a 54.6V output for a 48V battery. The clicking sound may be perfectly normal for a safety switch. Plug the charger into the battery first, then into the wall. It should be fine. What does the sticker on the back of the battery say? What does the input connecter from the charger look like compared to a dime or a calliper?

 

[6zfshdb]

If you want to spend some $$ on the problem, the Grin Satiator is arguably the most versatile and reliable charger on the market. It's completely sealed, has no moving parts and is fully programmable:

Satiator - Grin Products - Product Info

The Satiator is Grin's programmable 360W ebike charger: a 48V 8A model for 24V to 52V packs, and a 72V 5A model for 36V to 84V packs. One fan-free unit fast-charges almost any lithium, NiMH, or lead-acid battery in about half the time of a typical 4A charger, with custom and partial charge...

ebikes.ca

 

[Geneva]

We do plug into the battery and then turn on the power and also use a timer and charge the batteries for 2 hours,, off for 30 minutes and then charge for 2 hours, repeat until done.

 

[Gionnirocket]

A 48v battery requires a 54.6v output charger.
Are you able to achieve a full charge with your current charger?
Very odd that the label states 48v output.
There is no communication with your bms so you just need to match the connector.. and I'd keep it at the current amperage, low at 2 amp. 2.5a is fine, but that's another oddity as the majority are sized in 1amp increments.
The Satiator is a very nice charger but overkill imo unless you have a wide variety of batteries.
You basically have a generic charger so just look for a reputable seller that is in the charger/battery business with a good reputation
Quick search found this:

https://www.aliexpress.us/item/2251832696392476.html?pdp_npi=4%40dis%21USD%21US+%2456.25%21US+%2437.12%21%21%2156.25%2137.12%21%40210327b017930247189575742e0b83%2165603554421%21sh%21US%21179671233%21X&spm=a2g0o.store_pc_allItems_or_groupList.new_all_items_2007550086400.32882707228&gatewayAdapt=glo2usa

No personal experience with them but in business 10 years with a good rep

https://www.aliexpress.com/store/1101035444/pages/feedback.html?spm=a2g0o.store_pc_allItems_or_groupList.pcShopHead_11188545.2&sortType=bestmatch_sort

 

[EMGX]

I'm certainly no expert but I'd be careful if I was the OP. FWIW I have a Briggs and Stratton 48v lithium battery that is 43v nominal/48V MAX. The charger has 48v output, not 54.6 so a standard 48v (nominal) battery charger would likely dangerously overcharge a 43v nominal battery - if that is what the OP has.
LiFePO4 48v nominal charger is 58.4v so even the lithium battery chemistry matters for charger output, not just the nominal rated voltage. Maybe if OP posted the bike info and markings on the battery itself it would clear the situation up some. Don't burn your house down.

EDIT:
copied from Amazon DE/Germany listing. It appears that it is typical 48v nominal charger 54.6v output per this listing info

Brand	PowerSmart
Colour	black
Product dimensions	18D x 5W x 8.7H centimetres
Output voltage	54.6 Volts
Specification met	CE

---

About this item​

• With 3 pin plug
• Input: AC 100V-240V
• Output: 48V
• Output current: 2.5 A, weight: 0.68 kg
• Dimensions: 180 x 87 x 50 mm

 

[harryS]

You have two chargers and they are the same model for the same battery? If one clicks and the other doesn't, when plugged on the same battery, then I would say the clicking unit is at fault, Some chargers do use relays that click when they turn on and off.

Google says the STC 8108LD puts out 54.6V at full charge, basing that on pulling out certification reports that some companies file for chargers, You can check this by measuring your other charger, if it is the same. Otherwise, check your battery directly when it is charged, A nominal 48V battery goes higher than 48 when charged. Should measure 54,6 V in a perfect world, but in a world of $10 meters, anything around 54V will suffice,

The charger is available on amazon,be in Belgium, but otherwise doesn't show up in stock anywhere else. If you verify that the output is mislabelled, 48V being nominal, then it's safe to sunstitute a quality 54.6V charger with a max currrent of 2.5A.

The current is the more critical parameter. Some of the plugs, especially barrel plugs, are notorious for getting hot and melting the jack. Keep it at 2A for added safety.

 

[PedalUma]

I'm certainly no expert but I'd be careful if I was the OP. FWIW I have a Briggs and Stratton 48v lithium battery that is 43v nominal/48V MAX. The charger has 48v output, not 54.6 so a standard 48v (nominal) battery charger would likely dangerously overcharge a 43v nominal battery - if that is what the OP has.
LiFePO4 48v nominal charger is 58.4v so even the lithium battery chemistry matters for charger output, not just the nominal rated voltage. Maybe if OP posted the bike info and markings on the battery itself it would clear the situation up some. Don't burn your house down.

I agree. Show us the sticker on the back of the battery. Also, are the bike's specifications online. Last time we talked you were Sheboygan, MI. Have you headed south?

 

[Gionnirocket]

I'm certainly no expert but I'd be careful if I was the OP. FWIW I have a Briggs and Stratton 48v lithium battery that is 43v nominal/48V MAX. The charger has 48v output, not 54.6 so a standard 48v (nominal) battery charger would likely dangerously overcharge a 43v nominal battery - if that is what the OP has.
LiFePO4 48v nominal charger is 58.4v so even the lithium battery chemistry matters for charger output, not just the nominal rated voltage. Maybe if OP posted the bike info and markings on the battery itself it would clear the situation up some. Don't burn your house down.

EDIT:
copied from Amazon DE/Germany listing. It appears that it is typical 48v nominal charger 54.6v output per this listing info

Brand	PowerSmart
Colour	black
Product dimensions	18D x 5W x 8.7H centimetres
Output voltage	54.6 Volts
Specification met	CE

---

About this item​

• With 3 pin plug
• Input: AC 100V-240V
• Output: 48V
• Output current: 2.5 A, weight: 0.68 kg
• Dimensions: 180 x 87 x 50 mm

Good call... Even with just a little bit of uncertainty raised... I'd throw a voltmeter on it to be sure.
Many abnormalities coming from the wild wild East

 

[Geneva]

Sticker on battery

 

[PedalUma]

Sticker on battery View attachment 217006

That is great. It takes a 54.6V charger for a 48V battery. They are about $25, solid state. Many come with multiple adaptors.

 

[Geneva]

Thanks, I will see what I can find and post them to make sure it's correct. Appreciate all the info