This handle will operate with most Welch Allyn attachments. The handle
uses a replaceable battery that generally has about two years of life.
To charge the battery unscrew the handle about 1/3 of the way down from
the top and plug the charging unit 207212 into the exposed socket. It is
important that batteries are charged overnight before first use to
maximise future battery life. half charging or leaving on charge will damage battery and cause the battery to drain faster or not hold charge.