Red Bull have called an early halt to testing for the second day running at Jerez
Team falling behind rivals after just three laps completed on Thursday; Christian Horner and Adrian Newey leave Jerez to return to Milton Keynes HQ
By Mike Wise
Last Updated: 30/01/14 5:12pm
Daniel Ricciardo, who was making his debut appearance in the World Champions' new RB10, didn't appear at all during the first three hours of the session and his 'out lap' saw the Australian only reach turn 7 of the 4.428km track before his car ground to a halt.
Ricciardo was back out on track again about an hour later but managed just three laps in total before Red Bull decided to end their running.
The Milton Keynes based outfit later said that "issues similar to yesterday's" were to blame.
The battery is part of the power unit Red Bull and their rivals must use in response to Formula 1's technical shake-up this season. Renault said it had worked overnight on a fix and it could be the case that their packaging of the new 1.6-litre V6 turbo plus ancillaries is a contributory factor.
With Vettel completing only three laps on day one, it has undoubtedly been a troublesome start to pre-season testing for Red Bull, who have so far racked up significantly less mileage than their main rivals. Mercedes and Ferrari, for example, had respectively completed 160 laps and 104 laps by the time Ricciardo stopped around midday.
Embarrassingly, the latest breakdown also came in the presence of Red Bull owner Dietrich Mateschitz, who arrived in southern Spain on Thursday to get an update on the team's progress in the company of the energy drinks company's motorsport consultant Helmut Marko.
Laps completed so far at Jerez:
Mercedes - 177 laps
Ferrari - 136 laps
McLaren - 135 laps
Red Bull - 14 laps
Laps by power unit supplier:
Mercedes - 466 laps
Ferrari - 201 laps
Renault - 81 laps
The Sky Sports F1 Online team will be providing live commentary of all three winter tests, with live updates from trackside also on Sky Sports News.