Barrera charger recommendation?

[Piff]

I have a Halfords charger which claims to charge & maintain.
Trusted it but have been having low battery warnings in the BMW X3 even shortly after charging. Suspected the car battery as it seems BMWs are sensitive to battery issues. The car didn’t do many miles with the previous owner during Covid.
On the most recent charger connection the charger switched from “charging” to ”maintaining” after about 30 minutes but after a 15 minute journey the car warned of low battery.
I have a tipping trailer which I needed to use today after a few months of inactivity. So, put it on charge. After 30 mins to 1 hr the charger switched from “charging“ to “maintaining”. Left it connected for a couple of hours more.
Used the trailer today. On the first tip it struggled. On the second tip it failed half way up.
So, the Halfords charger is shite?
Can anyone recommend a better charger?

 

[Piff]

Hmmmm. Who can’t spell battery in the thread title?

 

[Bobby Dazzler]

CTEK MCS 5.0 is then go to charger. Bide your time and shop around and they can be had for less than £60, but more commonly £60-80.

 

[NJSS]

I agree, but suggest you consider the MXS 5.0 TEST & CHARGE.

The MXS 5.0 TEST & CHARGE is suitable for use with batteries from 1.2Ah-110Ah. Its testing function gives you three easy to use programs to test battery voltage, start power and alternator performance to give you a complete picture of battery and vehicle charging system health. The MXS 5.0 TEST & CHARGE also includes a patented automatic desulphation program, a special Recond mode for reconditioning deeply discharged batteries and CTEK’s patented float/pulse system, which is the most efficient maintenance mode when a battery is connected for long periods.

 

[W1ghty]

Maypole MP7423 Electronic Car Battery Charger 4A Fast Trickle Pulse Modes 4 AMP | eBay

Outputs: 6V: 4A DC 12V:4A DC. 4 charging modes : 12V Standard, AGM & Winter; 6V Standard. This is to avoid causing sparks near to the battery when making the connection. Overload, reverse-polarity and short circuit protection.

www.ebay.co.uk

Had this for years now

 

[Piff]

When looking for a price for the CTEK MCS 5.0 I came across this Genuine BMW Battery Trickle Charger 61432408593 5055535195542 | eBay and wondered if it did anything different to other chargers?
After the trailer tipper failure yesterday I left the Halfords charger on it overnight, It tipped this morning but didn't seem particularly lively.
Remembered that SWMBO needs the BMW tomorrow morning so put the Halfords charger back on it. It "charged" for about 20 minutes then went back to "maintaining". Noticed a few hours later though that it had switched back to charging. Maybe I'm expecting too much and modern chargers in conjunction with modern batteries only do slow rate charging.
Halfords Charger.
Looks like CTEK is the way to go.