Why would you think the EL29 OTA would perform any different? The active files are exactly the same. The only thing I could suggest is generic advice to perform a factory reset if you get strange behavior or unexplained battery drain.
If you really feel your issue would be resolved with the OTA, just backup your stuff and apply the OTA. If it still drains, then the issue for your case is EL29, not how you got EL29.