| Year | 1925 |
| Date | 18-Jun |
| Volume | 52 |
| Issue | 1,260 |
| Page | 693 |
| Category | Industrial Electrics |
| Part | |
| Title | Charging Small Accumulators as a Business |
| Author | Frederick H.Taylor |
| Notes | "Charging sets", "Ella" battery charger, larger outfits, rotary transformer for use on D.C. supply, switchboards, systems of battery charging, the constant potential method, motor generator, capacity of constant potential plant, cost of working & results |