Half a doctoral thesis I have organized to choose from and I almost gave up, yet this Rowenta because I fortunately noticed. With only 88 at Amazon RRP 139 course like also good.
The most important statement can be found anywhere: Motor wattage?
Unbelievable ...
So, at first a little math:
Charging in 6 hours with 25V and 0.3A are about 45Wh, duration 13 Minutes, so should the motor have about 200 watts.
In a little more boost.
The reviewers so do not overdo, you suction would be enough for me.
Of course make 200 watts only with correspondingly high voltage sense, otherwise the burden would be too high and would be both the efficiency too bad, as the cells also offer no useful life expectancy longer. Mathematically, I come to cells with ca 2500mAh, the burden would be at about 10A (180W / 18V) about 4C (four times the capacity), that's fine! Model airplane batteries are even loaded with 30C and make exactly why after 50-100 cycles limp. However, a handheld vacuum cleaner to keep longer, but he does not have to fly ...
Long story short:
The highest possible battery voltage is absolutely necessary if you want to have a good suction power over several months. But that does not even the producers make a watt indication of global increasing peoples stupidity is due ...
From all over the electrical design forth this vacuum cleaner is ideal!
More than 200 watts, it does not need, at 18V promise the batteries with 2500mAh long life with reasonable weight and there are no problems with chargers, as with other competitors. 25V 0.3A charging time 2 Stinden after 5 minutes sucking, which is designed simply perfect for me! With only 0.3A no transistor is warm ..
So opting for these vacuum cleaners and now to practice:
I'm really full of excited, my expectations of the suction power are greatly exceeded!
Is my first upright vacuum cleaner, which is at all usable with Delta nozzle and brush attachment. Toll!
Enthusiasm already at power:
The engine is electronically "booted", which can be identified by noise as S / U-Bahn. Whether it really is a brushless Motot with Freqzenzumrichter, I do not know but sounds like. Anyway, anyway, so the batteries as well as the motor are protected and can I expect a correspondingly long service life.
The volume is fully in order, less volume is imho only possible with less suction.
A lightweight is of the sucker not, but in the horizontal, the weight distribution is optimal.
Personally, I like also very good, that no "station" is necessary. The vacuum cleaner is easy to get around anywhere and is connected to the power supply cable. Others may perhaps prefer a station, this is a question of "taste", but makes the sucker no better or worse.
With suckers for 3-5 times as much money buys you only guarantees the name or style, but not better technology and more suction power I need.
