ABSTRACT : As a part of our Universal Immunization Programme (UIP), we implemented a trial on usage of battery-operated active vaccine carrier in maintaining the vaccines in the recommended temperature for longer duration in outreach sessions and to understand its operational feasibilities and benefits in six districts selected with the aim to cover rural, urban and tribal areas. Active vaccine carriers were found to have the benefit of maintaining vaccines in recommended temperature range for longer durations and the ease of knowing the temperature in the display panel made the HCWs more confident in ensuring the maintenance of recommended temperature at outreach sessions. Issues arising due to improper conditioning of icepacks in the traditional vaccine carriers are eliminated with the usage of active vaccine carriers and this may help to reduce vaccine wastage. These vaccine carriers were found to be best suited for outreach sessions in areas with difficult terrain, hard to reach or inaccessible areas.