And it sucks and sucks and sucks

All fire - or stove owners will know that wood and ash dirt somehow belong to the heating season. To this circumstance to be Lord, I have umgeguckt me for a hand vacuum cleaner. Following a detailed search in evaluation forums and Amazon I came across the M137, which has been meeting the following criteria:
- Good suction power
- Easy cleaning of the filter
- Long battery life
Found and ordered and not disappointed because:

Pro:
- Suction (to a clean filter) simplifies top
- Battery life I can not really specify, in minutes, because I have different life cycles, but I've never had to deal with an empty battery / underperforming.
- The cleaning of the filter is very simple (for coarse dirt). Hold, open, completed over the ash can. No dirty hands or next falling dust.

Contraindications:
-The Cleaning of the filter (for fine dust Dreck-)
As I mentioned the hand vacuum cleaner as above mainly use for the wicking of wood and ash dirt, many fine dust particles are excessively being present who do not end up in the sieve but behind attached fine filter.
So this must (usually weekly) to be cleaned, which I always do with the large vacuum cleaner.

Conclusion:
Strong buy recommendation. The counterpoint is me that is better than if no fine filter would be installed and I therefore about blowing the dust throughout the living room and would distribute.