electric charger
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Output ranges run from low single‑watt battery chargers up to about 20W for wall adapters. Wireless chargers list common power modes such as 5W, 7.5W, 10W and 15W, with specific items noting 10W or 15W outputs.
Battery chargers typically offer 2‑ or 4‑bay charging for AA/AAA cells. Single wireless chargers charge one device, while foldable chargers or dual wireless pads can charge two devices simultaneously.
Listings show support for NiMH AA/AAA rechargeable cells, built‑in lithium battery packs (portable power banks), and chargers with no internal battery such as wall adapters and wireless pads.
Many wireless chargers are described as Qi‑certified or Qi‑compatible and provide device compatibility lists naming specific phone and accessory models.
Chargers use visual LED indicators (commonly red/amber/green) and some include audible beeps. Wireless and wall chargers often list charge indicator lights or device‑detection feedback.
Common safety features include auto shutoff, Delta‑V charge cut‑off, bad/primary battery detection, reverse‑polarity protection, and safety timers to prevent overcharge.