The only difference between the 4iiii PRECISION and Podium power meters is the battery type. The PRECISION uses a CR2032 battery. This is a coin cell battery that is used on many power meters. Battery life is around the 100-hour mark. The Podium uses a rechargeable battery. Battery life for the Podium is around 60 hours.
Please note, 4iiii has discontinued the Podium and they now only offer the 4iiii PRECISION 3+ power meter.