My DIY Mobile Phone Charger is now at its last stage of improvement with this case.
I could only put 3 accu packs of 1640 mAh each into it, because the 4th would have made it troublesome to charge via USB,
which will be my primary energy source.
It has a total capacity of 4900 mAh, which hopefully will be enough for 2-3 charging cycles.
The LiPo Rider has moved to the bottom of the case, since the new packs are thicker than the old one had been.
You can get the LiPo Rider from here