A brushless car vacuum recommended by a follower, ¥24.9 paid with free shipping, probably export overstock. Try it first: the body looks like a Dyson, various nozzles included; two suction levels, Type-C charging; it can lift a phone, with the concentrator nozzle it works as a blower and pops a balloon, and it swallows large screws. Teardown: the clips are so tight they have to be cut; the motor is 7.4V 80W and really is brushless, with a brushless controller board, push-button switch, 2000mAh pack (brand XACN, with BMS) and a Type-C charging board. The old cells out of the pack: the first reads 23mΩ and 4.06V, the second 16mΩ and 3.88V — big spread in both resistance and voltage, no wonder it dies in minutes; don’t buy no-name cells. Replaced with DMEGC 25P salvaged A-grade 2500mAh, spot-welded with an AWithZ U3 on manual trigger, gear 4; with the new cells the airflow is much stronger. 129 comments: top ones ‘the price jumped straight away, it’s ¥49 now’, ‘one review and the price goes up 4–5×’; many asking for the link / shop; someone shared a teardown trick: warm the tail with a hair dryer and it pulls straight off, three screws come out easily (no need to cut the clips).