Editing Apple Newton MessagePad (section)

== Power ==
Apple made two adapters for the MessagePad. The Newton Power Adapter (model H1300 in North America, H2200 in Europe) is rated 7.0 V at 0.5 A and came with the Original MessagePad through the 130. The Newton 9W Power Adapter (model H0165) is rated 7.5 V at 1.2 A and came with the 2000 and 2100. Both work in any MessagePad, and the plug is tip positive.<ref name="faqpower">''Newton FAQ'', Part II: Hardware, B6 "Which batteries can I use?" and B7 "Which power adapters can I use?", [http://newtonfaq.com/newton-faq-hardware.html newtonfaq.com] (read 2 October 2026). Source for: the two Apple adapters, their model numbers and ratings; tip-positive plugs; a third-party adapter needing at least 6.0 V at 400 mA and no more than 7.5 V; users who damaged the power circuitry with non-Apple adapters; the warning that NiMH cells overheat when charged in a MessagePad 1x0; and that only Apple's pack charges inside a MessagePad 2000 or 2100.</ref><ref name="dsacc97">Apple Computer, ''MessagePad Accessories'' data sheet, November 1997, L00517K, 2 pp. Hosted as [[:File:MessagePad Accessories data sheet (1997).pdf]]. Newton 9W Power Adapter H0213LL/A: output 7.5 V at 1.2 A, 100–240 V input; it charges the NiCd pack of the 120 and 130 and the NiMH pack of the 2000 and 2100.</ref> The Newton FAQ records owners who damaged the power circuitry with non-Apple adapters. On the 2000 and 2100 an adapter above 7.5 V usually kills the MAX1771 converter in the 5 V supply, which is described in the [[Apple Newton MessagePad Troubleshooting Guide|troubleshooting guide]].<ref name="faqpower" /><ref name="fg2025">Frank Gründel, reply in "Need Assistance With Repairing eMate 300", NewtonTalk, 1 January 2025, [https://marc.info/?l=newtontalk&m=173576680331959&w=2 MARC archive]. Source for: a 2x00 on a supply above 7.5 V usually losing its MAX1771, and then trying to boot again and again before giving up; the eMate having the same IC (U29) next to C101; transformer T2 in the eMate backlight supply, whose loose top adds to the backlight whine; non-Apple adapters as a risk to the eMate.</ref>

The 110, 120 and 130 identify Apple's NiCd pack by its metal clamps, which press a switch in the battery compartment.<ref name="fg130">Frank Gründel, reply in "New MP130, no sound", NewtonTalk, 9 May 2009, [https://marc.info/?l=newtontalk&m=124190850421481&w=2 MARC archive]. Source for: the switch in the 1x0 battery compartment pressed by the pack's clamps; an adapter of 7 to 7.5 V, positive inside, current-limited to no more than 1.2 A; that cheap unregulated adapters can deliver two to three times their rated voltage at light load, so the open-circuit voltage should be measured; the charging station contacts on the 1x0.</ref> Loose AA cells do not press it, which is why owners who charge single NiCd cells in a 120 or 130 put a piece of card under them; the Newton FAQ warns that NiMH cells overheat if charged this way.<ref name="faqpower" /> Battery packs and chargers are covered on [[Apple Newton NiCd Battery Pack]], [[Apple Newton Rechargeable Battery Pack]] and [[Apple Newton Charging Station]].