Battery Drain After Full Charge

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http://forum.xda-developers.com – Scenario: Overnight Charging ROM: Stock - Battery charges to 100% 4.2V, Charging stops, battery starts draining, to 4.1V then charging starts again to top up the charge. this happens repeatedly overnight. I believe this is ideal. ROM: Custom ICS or JB - Battery charges to 100% 4.2V. Charging stops but battery just continously drain. No top up charging occurs. ROM: Stock Again - Battery charges like before. 100% then top up charging I think this is a ROM or Kernel issue, but im probably wrong. Is there a fix to get Top Up charging for custom roms and kernels? (HowTos)