lightweight external battery

[gbolt]

Agree with Heather_VT and ChuckT, there seems to be a tremendous drop off below 10,000 mAH. I have researched the Anker 5200 and really wanted to buy it. However, the review showed that it was really hit or miss. Yet the Anker 10,000 Core was almost all positive. I first purchased a Rave Power 10,400mAH because of the price. It was duel port and heavier than the Anker. Now that my daughter ran off with it; I am looking to purchase another External Battery and the Anker Core will probably be the one.

[iAmKrzys]

Anyone can put these batteries on a scale and check how much they weigh, but who has equipment to test their true capacity?

[MuddyWaters]

J

Anyone can put these batteries on a scale and check how much they weigh, but who has equipment to test their true capacity?

Not so much the capacity of battery that matters. That's simple.

Testing the capacity of it to charge another battery....is more difficult, and where many issues likely arise, including charging circuitry, such that the stated capacity is no where near what is actually realized sometimes.

As charge rate increases, due to internal battery resistance the terminal voltage drops, so a faster charger can realize less of its stated battery capacity than a much slower regulated charger.