Is that charger safe to use or not?

I’m sure its not but what you think abaut that?

Its made for EU consumer and also marked by CE.

Charger its from Banggood

Unfortunately the CE mark on cheap Chinese products is a notorious non-backed up claim.

Cheap AC powered devices from chinese sites? Avoid them like the plague. Presume all markings like “CE” are lies.

Its best to avoid all AC powered devices from chinese sites unless a reliable source has reviewed its safety. HKJ has reviewed many chargers. HKJ’s site: lygte-info.dk Batteries and Chargers

Instead get a usb li-ion charger from a chinese site. Use that with a usb AC power adapter from a major well known (non-chinese) seller. They have the most to lose if counterfeits get into their supply chain.

Could you give me some good example on USB charger?

I use only protected batteries Xtar, Efest and Panasonic so lengt are all of them abaut 70mm
and its problem to find out chargers now.

I want all my money back from Banggood >)

They banged you good, sorry, that store name is ridiculous, banggood.

Anyway it's not their fault for a questionable CE mark.

The ML-102 is a popular usb charger. It “can handle 69.6 mm long batteries”. Review: ML-102 Charger
Though it looks like some ML-102 have a different spring that doesn’t accommodate protected batteries. :~

~ Edit ~
ML-102 Version 3 Should be better for protected batteries.
ML-102 Version 5 Different spring. Doesn’t seem to accommodate protected batteries.

The ML-101 might be better for protected batteries. FastTech ML-101

Unfortunately its not available in FT but I’ll try find out somewhere now.

I use XTAR MP1s for some time now, and have no complaints at all.
IMHO, very nice product, bought at recommendation here - similar concept as ML chargers mentioned above.

If you are interested, you can easy find a few threads about it… just search.

I have in use Pila IBC, Nitecore i4 and Jetbeam i2 now
but some reason I try to find cheap charger.

I would not use that charger.

In my recent test I have started applying 5000 volt between the mains and the low volt side to check if the charger is safe.

This is not a full CE test. The voltage is slightly higher than required, but I do not inspect the physical conditions (4 mm air gab). But anything that handles 5000 volt without breaking down will be fairly safe for indoor usage, as long as it is not broken (CE does have requirements about physical strength).