Why I bought this battery? I use a heater (30 min) and these needed by the fan (stage 2) something of electric capacity in my Mazda 3. The original was with 42 Ah and only 360 A cold start performance quickly end. I use the EFB battery in a normal car without Start / Stop function. The winter here in Berlin is currently (max. 3 ° C) is not really strict, so I can not give a 100% rating. But so far everything is fine I ud'm assuming for the future. For me, the assessment of the Stiftung Warentest to the battery was important decisive. Is there anything negative to say: Yes, to reach 100% is hard. The battery must be in a specified battery in the car. This I have measured and the measurements were consistent with the specified dimensions of the battery match. But stupid is the lateral edge (is very easy to see in the picture) on the battery ground. This collides by the bottom of the battery receiving compartment of the car. Ask the manufacturer: What the rim and the plugged-removable white rails is needed? Would not this exist, everything would have 100% fit. So I had to make something to make them fit.
