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This is a quick overview of the improved thermals and battery life in the Dogwood batch.
Flipping the CPU to the other side of the PCB means that under heavy load, Dogwood’s screen heats up a bit more, while Chestnut heats the back cover. The way Dogwood manages heat is much more efficient, resulting in the hottest spot being 4 degrees Celsius cooler than in Chestnut.
The CPU also benefits from its new placement on the PCB.
Dogwood comes with a 75% bigger battery than Chestnut. Taking into account for a slightly higher power draw in dogwood, this comes out to around 60% more runtime.
How long a full charge lasts depends on what the Librem 5 is doing.
We are actively working on improving in use runtimes. In the future, we are also planning to support suspend to RAM. Since software won’t be running continually while suspended, standby time will increase drastically.