Generally speaking, the invention of technology is the materialization of scientific knowledge and experiential knowledge, so that the theory and knowledge which can be applied can be realized. The development of modern technology and the guidance of scientific theory have become the "application of science" to a great extent. However, the development of modern science is also inseparable from technology, which often becomes the aim of scientific research, and the development of technology provides the necessary technical means for scientific research. There is a relationship between them, mutual promotion and mutual restraint. Predictably, their connections will become more intimate and boundaries will blur
Nickel Cadmium and Nickel Metal Hydride types both have problems with what is known a memory effect, repeated partial discharge and recharge may cause battery to 'remember' the point where recharging usually starts, and hang this as its base point. This false empty cuts down on the amount of charge the device holds.
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