Welch Allyn SureSight Autorefractor - User Manual - Manual (Page 6)

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As a precaution, avoid using this product in close proximity to other
equipment. The product complies with current required standards for
electromagnetic interference and should not present problems to
other equipment or be affected by other devices.
Battery replacement: Replace with Welch Allyn model # 72420 Lith-
ium Ion battery only.
Do not attempt to disassemble or modify the battery pack. There are
no user serviceable parts inside pack.
Do not attempt to directly solder to the battery pack.
Do not attempt to connect the positive and negative battery termi-
nals to each other, nor to any other device.
“Caution” - use of controls or adjustments or performance of proce-
dures other than those specified herein may result in hazardous radi-
ation exposure.
Product contains two internal apertures within the laser tube assem-
bly. These are not user replaceable or user adjustable. DO NOT
attempt to make any aperture adjustments to this product.
Do not operate, charge, leave or discard battery pack in any environ-
ment where it may exceed 0°C to 40°C.
Do not immerse the battery pack in water.
Do not attempt to open or pierce the battery pack.
Do not strike or throw the battery pack.