This table compares the older version of PiZ-UpTime with the current version of PiZ-UpTime 2.0
| PiZ-UpTime | PiZ-UpTime 2.0 | |
| Charge Current | Max 1.0 A | Max 0.5A |
| Battery Chemistry (battery not supplied) | 14500 Li-Ion only | Li-Ion or Li-Polymer – attached via terminal block |
| Battery Holder | On top, 14500 size | None, attach via Terminal Block(s) |
| Access to Vin, Vout, Battery | No | Yes, via terminal blocks, and in software |
| Input V | Max 5.5V, via micro USB only |
Max 5.5V, via micro-USB (in) OR via terminal blocks (not included) |
| Output V | 4.6V to 5.1V | Regulated 5V out (±2%), irrespective of input V. No irritating “bolts” on Raspbian |
| Max Current | 1A | 2A |
| On/Off Switch | None. Only power reset switch is provided |
Can attach an external on/off switch for manual on/off. Power reset by pulling shunt out/in |
| UPS USB Out | Yes, via micro-USB | Yes, via micro-USB OR via terminal blocks |
| GPIO used | Yes | None – internal ADC is used |
| Vin, Vout, Battery and temperature info | None | Available via on-board 4 channel 12-bit ADC, accurate to 3mV (Temp ±2oC) |
| Python code for shutdown | Yes, depends on GPIO indicators |
Yes. Python code provides Vin, Vout, board temperature and Battery level. Can be modified for different use cases |
| External Battery | No, only via the AA battery holder on board |
Only external battery can be attached. Space on board for Li-Polymer batteries |
| Battery size | Usually 400-600 mAh (14500 battery capacity) |
Can be any capacity. Higher capacity takes longer to charge & provides longer run time on UPS |
| PiZ-UpTime | PiZ-UpTime 2.0 | |
| LED’s | Many | One – when battery is being charged. LED is off when battery is fully charged |
| Power in | Via micro-USB | Via micro-USB |
| UPS Power out | Via micro USB | Via micro USB, Terminal Blocks |
| Other | Many units in use worldwide. Uses built in ideal diode, limits max current to 1.2A. |
Uses Ideal diode OR – very little heat or power loss – efficient operation and seamless transition to battery backup for UPS |
| Shutdown Trigger point | Hardware – cannot be modified |
Can be modified in software. Battery V level when shutdown is triggered can be changed |
| Battery management / charging | Built on board, uses CCCV charging |
Built on board, uses CCCV charging |
| Board Color | Green with white text | Black with white text |
| UPC code | 691852747184 | 708088352577 |
| Planned use / future | Legacy. Not recommended for new designs |
Recommended for new designs |
| Models supported | Pi-Zero family | Pi-Zero family, Model 3B and below. Models 3B+ and Model 4 may stress the unit. Models 3B+ and Model 4 will also require a higher mAh battery to sustain the current needed during shutdown / reboot. |