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原帖由: rory.buszka ,

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It looks like there are a few opportunities for this and similar vacuums to lose suction, particularly if not properly used and emptied, but also over a longer period of regular use.

As described before, lithium-ion batteries degrade over time but this should not cause a loss of suction. Instead, degradation of the battery will cause the run time to be shorter between required charges. If the vacuum runs for only a short time between charges, or will not charge, the battery is the problem. Lithium Ion batteries require regular use, and they require the charge to be maintained within a certain range or the battery's capacity is dramatically reduced, so if you put this vacuum on the shelf for a year, it might not work after that. Normal use of this vacuum should not lead to loss of battery usability, though it may result in usage-related degradation (memory effect). Always discharge the battery fully between charges, and always allow the battery to charge fully before using, in order to prolong the life of the battery.

The key ways this vacuum can lose suction are blockages in the inlet, extender pipe, or brush roll air passages (look for pieces of paper, plastic, or rubber clogging the passages), clogging of the cyclone inlet screen (the screen that goes around the central purple part of the cyclone structure as shown in the pictures here, though the color varies; mine is dark blue), and clogging of the filter.

The DC 58 or other similar V6/V8-powered vacuums have a filter shaped like a long narrow cone, accessed by pulling up on the nipple that sticks out of the ring on top labeled "filter - filtre - filtro". This gets replaced as a unit; I don't see how this filter can be detached from its supporting structure, which also has two seals for the cyclonic structure.

Ideally the vacuum separates out fine dust using the cyclonic action, but dust buildup on the inside of the cyclones over time can also result in degradation of the cyclones' ability to maintain high air speed in the upper section as required for proper functioning. The cyclone structure should probably be cleaned every few months with a blast of compressed air or an air duster, to loosen any stuck-on fine dust particles, and the inside of the canister should be cleaned with a mildly damp sponge (no detergent).

Investigating these causes of reduced suction should help this vacuum be usable for a long time.

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