Battery runtime is capacity divided by draw. Capacity is measured in watt-hours: volts times amp-hours. A 20V 8.0Ah pack holds 160 Wh; the Qrachic 20-inch blower carries two, so 320 Wh on board. Its motor is rated 1,300 W, so at full load the packs last about 15 minutes. The 12-inch shovel carries two 20V 6.0Ah packs — 240 Wh total — against a 1,000 W motor, which works out to roughly 14 minutes at full load.

Those are worst-case figures: full load is dense, wet snow at a fast walking pace. Snow that is lighter, a slower pace, or a narrower pass all lower the draw and stretch the same charge. That is why we do not publish a single runtime number — the range depends on the conditions, and a number measured in a lab would not match your driveway.

Snow type is the biggest factor. Wet snow at a 6:1 ratio is roughly three times denser than cold powder at 20:1, and the motor works correspondingly harder. The same pack that clears a driveway of powder can fade halfway through wet slush.

Depth and speed matter next. Going slower and taking a narrower pass lowers the load and often finishes faster overall, because the machine is not constantly bogging down.

Cold reduces usable capacity. Lithium packs lose a noticeable share of their runtime when they start cold, and more when they are left on a cold machine. Keep the spare packs indoors until you need them, and fit the second pair warm rather than letting both sit in the cold.

Age matters too. A pack two or three seasons old holds less than it did when new, which is normal and gradual.

Lithium-ion tool packs are usually rated for several hundred full charge cycles before capacity drops to about 80%. In seasonal use that commonly works out to three to five winters, depending on how often you clear and how the packs are treated.

A snow blower is kinder to its packs than a daily tool: it works seasonally, and many owners run it a few dozen times a winter. The killers are neglect, not use — leaving a pack fully discharged for months, charging it hot, or storing it in an unheated shed.

Treat the packs well and you are more likely to replace them because the technology moved on than because they failed.

The packs ship partly charged, so charge both fully before the first use. Charging takes about 160 minutes for the 8.0Ah packs, and charging should happen at 32–113°F (0–45°C). Warmth during charging is normal.

Recharge soon after each use rather than leaving a depleted pack until spring. Never leave a pack fully discharged for three months. During the off-season, store the packs indoors, dry, at a moderate temperature, and check them at least every three months; top them up if they have dropped. The machine itself stores clean and dry, with the packs removed.

One more rule specific to these machines: both packs are required. The blower will not run on one pack, so keep the pair together and charge them as a pair.

Shorter runtime than last winter is the first sign, especially if it drops suddenly rather than gradually. A pack that will not reach a full charge, a charger that reports a fault, or a pack that gets unusually hot during charging all point the same way.

Before replacing, rule out the cheap explanations: charge in a warmer place, confirm both packs are matched and fully seated, and test with a second pair if you have one. If the pack still fades early in normal snow, it is worn out.

Do not open a pack or try to replace its cells. Buy a replacement pair and recycle the old one at a battery collection point.

About 15 minutes at full load on the 20-inch blower with two 8.0Ah packs, and about 14 minutes on the 12-inch shovel with two 6.0Ah packs. Lighter snow and a slower pace extend that considerably; wet snow and a fast pace shorten it.

No. Both Qrachic machines require two matched packs and will not start on one. Keep the pair together and charge them together.

Remove them after each use, wipe them dry, and store them indoors. Cold and moisture are the two things that shorten pack life fastest.

About 160 minutes for the 20V 8.0Ah packs on the 20-inch blower. Charge at 32–113°F (0–45°C) and let the pack cool first if it came in from a cold machine.