Three weeks ago I purchased a Titan T-510 starter kit with two manual batteries and a USB charger.
Both batteries was charges overnight.
But they only lasted for about 50 inhalations and after that the charging time was approx 25 minutes.
I have now charged the battteries several times and the result is the same. 25 min charging and approx 50 inhalations.
Then I purchased two 220mAh automatic batteries and when trying the charge them the LED in the charger is solid green and red.
Even if I charge the batteries overnight they last only for max 25 inhalations.
What to do