Not sure what a word/ sentence battery is? Read this: What is a word/ sentence battery?
If you want to review the words or sentences that have a discharging battery, you need to:
1. Tap on the "Review" tab.
2. Choose what you want to review: "Words" or "Sentences".
OR
3. Tap on the "Battery" tab;
4. Select one or more of the presented options:
a) Discharging 1- the words/ sentences that haven't participated in games for more than 7 days;
b) Discharging 2- the words/ sentences that haven't participated in games for more than 14 days;
c) Discharging 3- the words/ sentences that haven't participated in games for more than 21 days;
d) Discharged- the words/ sentences that haven't participated in games for more than 30 days;
5. Tap on the review button.
What is a Review?
Why is the Review empty?
Do I earn anything when making a Review?
How do I review what I have learned?
How do I review the alphabet I have learned?
How do I review the reading rules I have learned?
How do I review the words or sentences I have learned before?
How do I review the words or sentences from the level(s) I am learning?