
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

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

🔋 EBL Battery Charger Combo: Rechargeable AA Battery 2800mAh (4pcs) and AAA Battery 1100mAh (4pcs) + Charger for AA/AAA/C/D NiMH Batteries
39 Review

Dlyfull LCD Battery Tester - Universal Checker For AA AAA C D 9V CR2032 CR123A & More, 2X AAA Batteries Included
34 Review

TalentCell 12V Lithium-Ion Battery Pack For LED Strips, CCTV Cameras & More – Rechargeable With Multi-LED Indicator
44 Review