I originally bought the one on the right which chargers the batteries in parallel while the one on the left is the new one the cost of batteries are high but these as about the same price and last a long time I have a set of 2800mah aa on my oculus quest and rift s controllers I charge the batteries 1 a week I'm going to buy more batteries will come drained but charge them up and put them away for use
5-Pack EBL 9V Rechargeable Lithium Ion Batteries With 600MAh Capacity And 5-Bay Charger For Smoke Alarm Detectors - 2A Input
34 Review
LCD Battery Tester For Universal Battery Types - AA, AAA, C, D, 9V, CR2032, CR123A, CR2, CRV3, 2CR5, CRP2, 1.5V/3V Button Cells With Included AAA Battery
29 Review
TalentCell 12V Lithium-Ion Battery Pack For LED Strips, CCTV Cameras & More – Rechargeable With Multi-LED Indicator
44 Review
Fireproof Battery Organizer Storage Case: Waterproof & Explosionproof Safe Bag Fits 210+ Batteries - With Tester BT-168, Carrying Container Bag For AA AAA C D 9V Lithium 3V Holders
49 Review