TrustFire 14500 3.7V 900mAh Rechargeable Batteries -Blue (2-Pack)

Blue - A primary colour

Heat - A term used to define thermal energy

Cm - Centimetres, one centimetre is equal to 10 milimetres

Batteries - Portable Power sources in cell form

Voltage - A measurement of volts.

Rechargeable - Something that can be charged back to its original state, e.g. batteries.

Li-ion - A rechargable battery. Popular in portable electronics combining one of the best energy densities and not suffering memory effect. Very slow loss of charge when not in use.

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