Friday, April 22, 2011

Care For Nimh Rechargeable Batteries

NIHM batters are available in multiple forms, from consumer replaceable to fixed industrial applications.


NIHM batteries are made of nickel metal hydride composites that allow for the battery to be recharged. However, this composite of nickel metal hydride develops a "memory" of its previous power levels. If the same power level is used over and over again, without maintenance, the battery can become used to that power level. To prevent this from occurring, the battery must be fully discharged and recharged occasionally to prevent a burn-in of the "memory" level.


Instructions


1. Fully charge your battery in the recharger when you first get the batteries. Do not take the batteries out until the charge light displays green. Insert the NIHM batteries into your devices and use the batteries up completely. If you take it out with some power left over, the battery will start to "forget" that part of the battery. Only once it is fully discharged should you recharge the NIHM batteries with their associated recharger. This has to be done three times to break in the battery.


2. Keep the battery clean and dry, using a dry cloth to keep the contacts clean. Do not store NIHM batteries in the freezer, as this does nothing for NIHM batteries and the moisture can cause electrical shorts. Do not store the battery in hot places like directly in the sun, as the thermal expansion of the NIHM composite can cause the casing to bulge and render the battery unusable.


3. Do not drop or expose the batteries to fire. Drops can cause kinetic force to be transferred to the integral nickel metal hydride composite structure and break its fragile matrix. Fire can cause thermal expansion that would distort the battery and possibly explode the battery.







Tags: NIHM batteries, metal hydride, nickel metal, nickel metal hydride, fully discharged