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2. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage , amperes, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

3. MagSafe - Wikipedia

   en.wikipedia.org/wiki/MagSafe

   The Apple LED Cinema Display and Thunderbolt Display include built-in MagSafe chargers. [11] The MacBook and the 13-inch MacBook Pro use a 60 W MagSafe charger, whereas the 15- and 17-inch MacBook Pro use an 85 W version. The MacBook Air used a lower-powered 45 W version.

4. Comparison of commercial battery types - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_commercial...

   H 2 SO 4: Lead dioxide: Yes 1881 [1] 1.75 [2] 2.1 [2] 2.23–2.32 [2] 0.11–0.14 (30–40) [2] 0.22–0.27 (60–75) [2] 180 [2] 5.44–13.99 (72–184) [2] 50–92 [2] 3–20 [2] Zinc–carbon: Carbon–zinc Zinc: NH 4 Cl Manganese (IV) oxide: No 1898 [3] 0.75–0.9 [3] 1.5 [3] 0.13 (36) [3] 0.33 (92) [3] 10–27 [3] 2.49 (402) [3] 50–60 [3 ...

5. Depth of discharge - Wikipedia

   en.wikipedia.org/wiki/Depth_of_discharge

   While the state of charge is usually expressed using percentage points (0 % = empty; 100 % = full), depth of discharge is either expressed using units of Ah (e.g. for a 50 Ah battery, 0 Ah is full and 50 Ah is empty) or percentage points (100 % is empty and 0 % is full). The capacity of a battery may also be higher than its nominal rating.

6. Battery nomenclature - Wikipedia

   en.wikipedia.org/wiki/Battery_nomenclature

   A single zinc-carbon cell, "size 20" which is equivalent to D, or ANSI "13" size 4R25X: 4: R: 25: X: A zinc-carbon lantern battery, consisting of 4 round "size 25" cells in series. Terminated with spring terminals. 4LR25-2: 4: L: R: 25: 2: An alkaline lantern battery, consisting of 2 parallel strings of 4 round "size 25" cells in series 6F22: 6 ...

7. Common external power supply - Wikipedia

   en.wikipedia.org/wiki/Common_external_power_supply

   USB battery charging: Battery Charging v1.2 Spec. and Adopters Agreement USB Implementers Forum, 2010-12-07. EU common External Power Supply: One Charger For All.eu Archived 25 September 2012 at the Wayback Machine, European Commission Enterprise and Industry Directorate – General